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)
From each according to his ability, to each according to his needs life but life's prime want". Marx explained his belief that, in such a society, each person would be motivated to work for the good of society despite the absence of a social mechanism "compelling" them to work, because work would have become a pleasurable and creative activity. Marx intended the initial part of his slogan, "from each according to his ability" to suggest not merely that each person should work as hard as they can, but that each person should best develop their particular talents. Claiming themselves to be at a "lower stage of communism" (i.e. "socialism", in line with