One of Bahá'u'lláh's teachings is the adjustment of means of livelihood in human society. 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....
Difference of capacity in human individuals is fundamental. It is impossible for all to be alike, all to be equal, all to be wise. Bahá'u'lláh has revealed principles and laws which will accomplish the adjustment of varying human capacities. 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-Baha, ‘The Promulgation of Universal Peace: Talks Delivered by 'Abdu'l-Bahá during His Visit to the United States and Canada in 1912’; The Compilation of Compilations, vol. III, Economics, Agriculture, and Related Subjects)
