To appreciate how income taxation reduces prosperity form what it could be, imagine a 100 percent tax on incomes. We wouldn't expect much prosperity in such a society. People would have no incentive to earn money. They would devote resources to hiding the little they did earn. No investments would be made. No savings would exist to increase living standards. People's activities would be grossly influenced by the tax. If we lower the rate from 100 percent, the principle does not change. . . If you want less of something, tax it.