"A rising tide lifts all boats...

...It is a paradoxical truth that tax rates are too high today and tax revenues are too low -- and the soundest way to raise revenues in the long run is to cut rates now. The experience of a number of European countries has borne this out. This country's own experience with tax reductions...has borne this out, and the reason is that only full employment can balance the budget -- and tax reduction can pave the way to full employment. The purpose of cutting taxes now is not to incur a budgetary deficit but to achieve the more prosperous expanding economy which will bring a budgetary surplus."

Who said it?