Supply-side economics
Supply-side economics was used while Ronald Reagan was president during the 1980's.  Income taxes on the wealthiest Americans were cut from 70% to 50% to 28% during his two terms.  Also, capital gains taxes were cut.  Supporters of supply-side economics mention that those tax cuts have resulted in economic recovery during the 1980's and the strong economic boom in the 1990's and first decade of the 21st century.