No, it's NOT a fact. There may be very good arguments for specific tax cuts just as there may be very good arguments for specific spending. But the idea that a general income tax cut will increase revenue is false and, to my knowledge, is not supported by any serious economic study. Read the analysis at http://www.econdataus.com/taxcuts.html and tell me what specific numbers or conclusions you disagree with. Alternately, provide a link to one serious economic study that purports to show that general income tax cuts increase revenues over what they would have been otherwise. Thanks.
When Kennedy lowered marginal tax rates, the economy pulled out of recession and grew and federal tax revenues soared.
When Reagan lowered marginal tax rates, the economy pulled out of recession and grew and federal tax revenues soared.
When Bush 41 compromised with the democrats and signed the democrat tax rate increase, the economy stalled and fell into a brief recession, but started recurring a year before clinton took office.
When Bush 43 lowered marginal tax rates, the economy grew and federal tax revenues soared.