I thought this was informative.
"A string of millionaire candidates for public office has duped a good chunk of the electorate into thinking the way to create jobs and otherwise solve the problems of the middle class is to cut the taxes of the wealthy. That's absurd. If the massive tax cuts of the Reagan era didn’t do the average worker much good, trimming another percent or two now sure won’t."
The Straight Dope: Does cutting taxes create jobs?
(Meanwhile, when you hear rebuttals that 49.5% of Americans pay no federal income tax, keep in mind that it might be because they're part of the poorest 60 percent of Americans that collectively own less than 5% of our nation's total wealth.)