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The Laffer curve and supply side economics inspired the Kemp-Roth Tax Cut of 1981.
Figure 1: t* represents the optimal rate of taxation
Supply-side advocates of the 1980s claimed that lower tax rates would generate more revenue because government was operating on the right side of the curve. Conventional economic paradigms acknowledge this basic notion, but argue that government was operating on the left side of the curve, so a tax cut would thus lower revenue. The central question is the elasticity of work with respect to tax rates.
In the United States, some claimed that both tax cuts and government spending policies of the 1980s caused large budget deficits. Others claim that the data actually shows United States government revenue increased during that period, suggesting that deficits were unrelated to tax cuts, and should be attributed to increased spending alone.
The central idea of the Laffer curve had been written about in antiquity by many scholars including the Islamic Scholar Ibn Khaldun.
Rumor suggests the Laffer Curve was originally sketched on a restaurant napkin in the late 1970s as Art Laffer and Robert Mundell described the concept to Jude Wanniski.