And how many of those paid the “payroll tax” got it back (and more!) as “Earned Income Tax Credit,” eh?
http://money.cnn.com/2011/04/14/pf/taxes/who_pays_income_taxes/index.htm
They do address payroll taxes, which are largely social security and medicare. These, in my view, are not really relevant to the argument at hand - given that it is federal income tax that is at the center of the current political debate.
I'm sure that the truth is much more complex than can be appreciated from a superficial examination of the data, and that this can be spun many ways depending upon what one’s political position is.