“You … often hear the claim that a lot of tax cuts will ‘pay for themselves,’ that they’ll cause so much additional economic activity that the revenue feedback from that activity will fully offset the direct revenue loss caused by the tax cut so that you end up making money for the federal government, or at least not losing any money. Now, of course that is theoretically possible and it would happen at extreme rates. I mean if a country had a 99 percent flat rate income tax and lowered it to 98 percent, I believe that they almost certainly would collect more revenue at the 98 percent rate than they did at the 99 percent rate. But the idea that this type of effect would occur at today’s tax levels just requires responses that are much bigger than statistical evidence would support and I think much bigger than common sense would indicate if you just ask people how they themselves would react to the tax cut.”

-- Alan Viard, tax policy expert at the American Enterprise Institute