He has said that whatsoever is possible of accomplishment in human government will be effected through these principles. When the laws He has instituted are carried out, there will be no millionaires possible in the community and likewise no extremely poor. This will be effected and regulated by adjusting the different degrees of human capacity. The fundamental basis of the community is agriculture, tillage of the soil. All must be producers. 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-Bahá, The Promulgation of Universal Peace, p. 217

But here is the real solution. The rich should be merciful to the poor, but with their free-will, not with force. Should it be with force it would be useless. It should be according to law and not by violence, so that through a general law every one might know his duty. For example, a rich person has a large income and a poor person a small income. To put it in a more explicit way: a rich person in this case must be exempt from taxes. If the poor person gives one-tenth of his income and the rich person one-tenth of his income, it will be unjust. Thus in this way a law should be made that the poor person who has only ten kilos and needs them all for his necessary food, be exempt from paying taxes. But if the rich person, who has ten thousand kilos, pays one-tenth or two-tenths taxes on his products, it will not be a hardship to him. For example, if he gives two thousand kilos, he will still have eight thousand kilos. If a person has fifty thousand kilos, even though he gives ten thousand kilos he will still have forty thousand kilos. Therefore, laws must be made in this way. These laws must do away with the present system of wages and earnings. If today the owners of factories increase the wages of their employees, after a month or a year, they will again cry and strike and ask for more increase. This work has no end.

Compilations, Bahá’í Scriptures, p. 341