Is it possible that supply-side economics could have existed before the 1980s? Yes. Read the story of Joseph and Pharaoh in Genesis 41. Following Joseph's suggestion (Gen 41:34), Pharaoh reduced the tax on Egyptians to 20% during the 'seven years of plenty' and the 'Earth brought forth in heaps.' (Gen. 41:47).
- Rush Limbaugh, See I Told You So 80 (1994), also see http://www.rushlimbaugh.com/home/daily/site_112509/content/01125113.guest.html.