Laffer curve D. Rockefeller and Henry Ford. While he served as Secretary of the U.S. Treasury Department his wealth peaked at around US$300–US$400 million. Personal income-tax receipts rose from US$719 million in 1921 to over US$1 billion in 1929, an average increase of 4.2% per year over an 8-year period, which supporters attribute to the rate cut. David Hume also expressed similar arguments in his essay "Of Taxes" in 1756, as did fellow Scottish economist Adam Smith, twenty years later. The Democratic party made a similar argument in the 1880s when high revenue from import tariffs raised during the Civil War (1861–1865)
To each according to his contribution the amount of labor contributed increases. However capitalism can lead to a situation where the means of production are owned by a small minority who do not produce, but rather live off the labor of others. Socialism is said to remedy this by putting the means of production in common hands and rewarding individuals according to their contributions. In the "Critique of the Gotha Programme", while criticizing Lassalle's ideas, Marx elaborates on the theory. According to Marx's analysis of the Programme, Lassalle suggests that "the proceeds of labor belong undiminished with equal right to all members of society". While agreeing