There are a lot of telling stats on taxes - E.G.:
"As we come to the end of the Bush administration, the top 1% of American taxpayers already pay 40% of all income taxes -- the highest level in 40 years. The top 10% of income earners pay 71% of the taxes."
http://online.wsj.com/article/SB121910117767951201.html?mod=todays_columnists
But this one makes an unarguable point. If we desire to compete in the world for producers, we should be a place where producers can keep what they make so that we can keep them here producing.
http://mjperry.blogspot.com/2009/09/us-income-taxes-headed-in-wrong.html