The World Is Flat: But America is a laggard in the tax-reform revolution.

It may be a matter of long-term economic survival. America's taxes on profits are around 40%, when you combine federal, state and local levies. With the possible exception of Japan, that rate is about the highest of any developed nation in the world today. If the U.S. doesn't adopt the flat tax it may find itself losing jobs, capital and ambitious entrepreneurs to nations with a more ambitious growth agenda.

Instead of NAFTA, maybe this is the real reason why some jobs are leaving the US. Just my opinion. :-)