Would Americans benefit from a single tax rate that applies to all taxpayers?

Texas Gov. Rick Perry has announced that he will propose a national flat tax next week. One of the other candidates for the Republican presidential nomination, Herman Cain, has staked much of his own campaign on his “9-9-9” plan, which would tax business income, personal income and sales at a uniform rate of 9 percent. Today’s Question: Would Americans benefit from a single tax rate that applies to all taxpayers?