[A]n economy hampered by restrictive tax rates will never produce enough revenues to balance our budget, just as it will never produce enough jobs or enough profits. Surely the lesson of the last decade is that budget deficits are not caused by wild-eyed spenders but by slow economic growth and periodic recessions. And any new recession would break all budget deficit records.In short, it is a paradoxical truth that tax rates are too high today and tax revenues are too low. And the soundest way to raise the revenues in the long run is to cut the rates now. John F. Kennedy
Economic Club of New York, December 14, 1962 on supply side taxes cuts [the full out-take is in the database], 35th President of the United States, 1961-1963 (1917-1963)