Arthur Laffer he learned it from Ibn Khaldun and John Maynard Keynes. A simplified view of the theory is that tax revenues would be zero if tax rates were either 0% or 100%, and somewhere in between 0% and 100% is a tax rate which maximizes total revenue. Laffer's postulate was that the tax rate that maximizes revenue was at a much lower level than previously believed: so low that current tax rates were above the level where revenue is maximized. Numerous leading economists have rejected the view that a tax rate cut of current federal US income taxes can lead to
From each according to his ability, to each according to his needs if any member of society has an unsatisfied need, each member has a duty to produce its object (if they can). But that is precisely what the principle ‘from each according to their abilities, to each according to their needs!’ dictates. In Marx’s vision, the basic principle of developed communism is a principle of solidarity in respect of need.' Marx delineated the specific conditions under which such a creed would be applicable—a society where technology and social organization had substantially eliminated the need for physical labor in the production of things, where "labor has become not only a means of