From the Writings and Utterances of `Abdu’l-Baha:
One of the most important principles of the Teaching of Baha’u’llah is:
The right of every human being to the daily bread whereby they exist, or the equalization of the means of livelihood.
The arrangements of the circumstances of the people must be such that poverty shall disappear, that everyone, as far as possible, according to his rank and position, shall share in comfort and well-being.
(`Abdu’l-Baha: Paris Talks, p. 151)

The fundamentals of the whole economic condition are divine in nature and are associated with the world of the heart and spirit. This is fully explained in the Baha’i teaching, and without knowledge of its principles no improvement in the economic state can be realized. The Baha’is will bring about this improvement and betterment but not through sedition and appeal to physical force – not through warfare, but welfare. Hearts must be so cemented together, love must become so dominant that the rich shall most willingly extend assistance to the poor and take steps to establish these economic adjustments permanently. If it is accomplished in this way, it will be most praiseworthy because then it will be for the sake of God and in the pathway of His service. For example, it will be as if the rich inhabitants of a city should say, “It is neither just nor lawful that we should possess great wealth while there is abject poverty in this community,” and then willingly give their wealth to the poor, retaining only as much as will enable them to live comfortably.
Strive, therefore, to create love in the hearts in order that they may become glowing and radiant. When that love is shining, it will permeate other hearts even as this electric light illumines its surroundings. When the love of God is established, everything else will be realized. This is the true foundation of all economics.
(`Abdu’l-Baha: Promulgation of Universal Peace, pp. 238-239)

To state the matter briefly, the Teachings of Baha’u’llah advocate voluntary sharing, and this is a greater thing than the equalization of wealth. For equalization must be imposed from without, while sharing is a matter of free choice.
Man reacheth perfection through good deeds, voluntarily performed, not through good deeds the doing of which was forced upon him. And sharing is a personally chosen righteous act: that is, the rich should extend assistance to the poor, they should expend their substance for the poor, but of their own free will, and not because the poor have gained this end by force. For the harvest of force is turmoil and the ruin of the social order. On the other hand voluntary sharing, the freely-chosen expending of one’s substance, leadeth to society’s comfort and peace. It lighteth up the world; it bestoweth honour upon humankind.
(`Abdu’l-Baha: Selections … `Abdu’l-Baha, p. 115)

The fourth principle or teaching of Baha’u’llah is the readjustment and equalization of the economic standards of mankind. This deals with the question of human livelihood. It is evident that under present systems and conditions of government the poor are subject to the greatest need and distress while others more fortunate live in luxury and plenty far beyond their actual necessities. This inequality of portion and privilege is one of the deep and vital problems of human society. That there is need of an equalization and apportionment by which all may possess the comforts and privileges of life is evident. The remedy must be legislative readjustment of conditions. The rich too must be merciful to the poor, contributing from willing hearts to their needs without being forced or compelled to do so. The composure of the world will be assured by the establishment of this principle in the religious life of mankind.
(`Abdu’l-Baha: Promulgation of Universal Peace, p. 107)

Under this adjustment there can be no extremes in human conditions as regards wealth and sustenance. For the community needs financier, farmer, merchant and laborer just as an army must be composed of commander, officers and privates. All cannot be commanders; all cannot be officers or privates. Each in his station in the social fabric must be competent – each in his function according to ability but with justness of opportunity for all.
(`Abdu’l-Baha: Promulgation of Universal Peace, p. 216)

It is, therefore, preferable for moderation to be established by means of laws and regulations to hinder the constitution of the excessive fortunes of certain individuals, and to protect the essential needs of the masses. For instance, the manufacturers and the industrialists heap up a treasure each day, and the poor artisans do not gain their daily sustenance: that is the height of iniquity, and no just man can accept it. Therefore, laws and regulations should be established which would permit the workmen to receive from the factory owner their wages and a share in the fourth or the fifth part of the profits, according to the capacity of the factory; or in some other way the body of workmen and the manufacturers should share equitably the profits and advantages. Indeed, the capital and management come from the owner of the factory, and the work and labor, from the body of the workmen. Either the workmen should receive wages which assure them an adequate support and, when they cease work, becoming feeble or helpless, they should have sufficient benefits from the income of the industry; or the wages should be high enough to satisfy the workmen with the amount they receive so that they may themselves be able to put a little aside for days of want and helplessness.
When matters will be thus fixed, the owner of the factory will no longer put aside daily a treasure which he has absolutely no need of (for, if the fortune is disproportionate, the capitalist succumbs under a formidable burden and gets into the greatest difficulties and troubles; the administration of an excessive fortune is very difficult and exhausts man’s natural strength). And the workmen and artisans will no longer be in the greatest misery and want; they will no longer be submitted to the worst privations at the end of their life.
(`Abdu’l-Baha: Some Answered Questions, pp. 274-275)

It should not be imagined that the writer’s earlier remarks constitute a denunciation of wealth or a commendation of poverty. Wealth is praiseworthy in the highest degree, if it is acquired by an individual’s own efforts and the grace of God, in commerce, agriculture, art and industry, and if it be expended for philanthropic purposes. Above all, if a judicious and resourceful individual should initiate measures which would universally enrich the masses of the people, there could be no undertaking greater than this, and it would rank in the sight of God as the supreme achievement, for such a benefactor would supply the needs and insure the comfort and well-being of a great multitude. Wealth is most commendable, provided the entire population is wealthy. If, however, a few have inordinate riches while the rest are impoverished, and no fruit or benefit accrues from that wealth, then it is only a liability to its possessor. If, on the other hand, it is expended for the promotion of knowledge, the founding of elementary and other schools, the encouragement of art and industry, the training of orphans and the poor – in brief, if it is dedicated to the welfare of society – its possessor will stand out before God and man as the most excellent of all who live on earth and will be accounted as one of the people of paradise.
(`Abdu’l-Baha: Secret of Divine Civilization, pp. 24-25)

Among the results of the manifestation of spiritual forces will be that the human world will adapt itself to a new social form, the justice of God will become manifest throughout human affairs, and human equality will be universally established. The poor will receive a great bestowal, and the rich attain eternal happiness. For although at the present time the rich enjoy the greatest luxury and comfort, they are nevertheless deprived of eternal happiness; for eternal happiness is contingent upon giving, and the poor are everywhere in the state of abject need. Through the manifestation of God’s great equity the poor of the world will be rewarded and assisted fully, and there will be a readjustment in the economic conditions of mankind so that in the future there will not be the abnormally rich nor the abject poor. The rich will enjoy the privilege of this new economic condition as well as the poor, for owing to certain provisions and restrictions they will not be able to accumulate so much as to be burdened by its management, while the poor will be relieved from the stress of want and misery. The rich will enjoy his palace, and the poor will have his comfortable cottage.
(`Abdu’l-Baha: Promulgation of Universal Peace, p. 132)

Among them are (the teachings) concerning the question of economics that all the members of the body politic may enjoy through the working out of this solution the greatest happiness, welfare and comfort without any harm or injury attacking the general order of things. Thereby no difference or dissension will occur. No sedition or contention will take place. This solution is this:
First and foremost is the principle that to all the members of the body politic shall be given the greatest achievements of the world of humanity. Each one shall have the utmost welfare and well-being. To solve this problem we must begin with the farmer; there will we lay a foundation for system and order because the peasant class and the agricultural class exceed other classes in the importance of their service. In every village there must be established a general storehouse which will have a number of revenues.
The first revenue will be that of the tenth or tithes.
The second revenue (will be derived) from the animals.
The third revenue, from the minerals, that is to say, every mine prospected or discovered, a third thereof will go to this vast storehouse.
The fourth is this: whosoever dies without leaving any heirs all his heritage will go to the general storehouse.
Fifth, if any treasures shall be found on the land they should be devoted to this storehouse.
All these revenues will be assembled in this storehouse.
As to the first, the tenths or tithes: we will consider a farmer, one of the peasants. We will look into his income. We will find out, for instance, what is his annual revenue and also what are his expenditures. Now, if his income be equal to his expenditures, from such a farmer nothing whatever will be taken. That is, he will not be subjected to taxation of any sort, needing as he does all his income. Another farmer may have expenses running up to one thousand dollars we will say, and his income is two thousand dollars. From such an one a tenth will be required, because he has a surplus. But if his income be ten thousand dollars and his expenses one thousand dollars or his income twenty thousand dollars, he will have to pay as taxes, one-fourth. If his income be one hundred thousand dollars and his expenses five thousand, one-third will he have to pay because he has still a surplus since his expenses are five thousand and his income one hundred thousand. If he pays, say, thirty-five thousand dollars, in addition to the expenditure of five thousand he still has sixty thousand left. But if his expenses be ten thousand and his income two hundred thousand then he must give an even half because ninety thousand will be in that case the sum remaining. Such a scale as this will determine allotment of taxes. All the income from such revenues will go to this general storehouse.
Then there must be considered such emergencies as follows: a certain farmer whose expenses run up to ten thousand dollars and whose income is only five thousand, he will receive necessary expenses from the storehouse. Five thousand dollars will be allotted to him so he will not be in need.
Then the orphans will be looked after, all of whose expenses will be taken care of. The cripples in the village – all their expenses will be looked after. The poor in the village – their necessary expenses will be defrayed. And other members who for valid reasons are incapacitated – the blind, the old, the deaf – their comfort must be looked after. In the village no one will remain in need or in want. All will live in the utmost comfort and welfare. Yet no schism will assail the general order of the body politic.
Hence the expenses or expenditures of the general storehouse are now made clear and its activities made manifest. The income of this general storehouse has been shown. Certain trustees will be elected by the people in a given village to look after these transactions. The farmers will be taken care of and if after all these expenses are defrayed any surplus is found in the storehouse it must be transferred to the national treasury.
This system is all thus ordered so that in the village the very poor will be comfortable, the orphans will live happily and well; in a word, no one will be left destitute. All the individual members of the body politic will thus live comfortably and well.
For larger cities, naturally, there will be a system on a larger scale. Were I to go into that solution the details thereof would be very lengthy.
The result of this (system) will be that each individual member of the body politic will live most comfortably and happily under obligation to no one. Nevertheless, there will be preservation of degree because in the world of humanity there must needs be degrees. The body politic may well be likened to an army. In this army there must be a general, there must be a sergeant, there must be a marshal, there must be the infantry; but all must enjoy the greatest comfort and welfare.
God is not partial and is no respecter of persons. He has made provision for all. The harvest comes forth for everyone. The rain showers upon everybody and the heat of the sun is destined to warm everyone. The verdure of the earth is for everyone. Therefore there should be for all humanity the utmost happiness, the utmost comfort, the utmost well-being.
But if conditions are such that some are happy and comfortable and some in misery; some are accumulating exorbitant wealth and others are in dire want – under such a system it is impossible for man to be happy and impossible for him to win the good pleasure of God. God is kind to all. The good pleasure of God consists in the welfare of all the individual members of mankind.
(`Abdu’l-Baha: Foundations of World Unity, pp. 39-41)

Each person in the community whose need is equal to his individual producing capacity shall be exempt from taxation. But if his income is greater than his needs, he must pay a tax until an adjustment is effected. That is to say, a man’s capacity for production and his needs will be equalized and reconciled through taxation. If his production exceeds, he will pay a tax; if his necessities exceed his production, he shall receive an amount sufficient to equalize or adjust. Therefore, taxation will be proportionate to capacity and production, and there will be no poor in the community.
(`Abdu’l-Baha: Promulgation of Universal Peace, p. 217)

From the Writings of Shoghi Effendi:
Social inequality is the inevitable outcome of the natural inequality of man. Human beings are different in ability and should, therefore, be different in their social and economic standing. Extremes of wealth and poverty should, however, be abolished…
The Master has definitely stated that wages should be unequal, simply because that men are unequal in their ability and hence should receive wages that would correspond to their varying capacities and resources.
(Shoghi Effendi: Directives of the Guardian, p. 20)

From Letters Written on Behalf of Shoghi Effendi:
With regard to your question concerning the Baha’i attitude towards labour problems; these cannot assuredly be solved, Abdu’l-Baha tells us, through the sheer force of physical violence. Non-cooperation too, even though not accompanied by acts of violence, is ineffective. The conflict between labour and capital can best be solved through the peaceful and constructive methods of cooperation and of consultation.
(Shoghi Effendi, quoted by the Universal House of Justice: Lights of Guidance, pp. 427-428)

From the Writings of the Universal House of Justice:
The inordinate disparity between rich and poor, a source of acute suffering, keeps the world in a state of instability, virtually on the brink of war. Few societies have dealt effectively with this situation. The solution calls for the combined application of spiritual, moral and practical approaches.
(The Universal House of Justice: Lights of Guidance, p. 552)