Herman Cain’s 9-9-9 proposal — a 9 percent personal-income tax, a 9 percent corporate-income tax, and a 9 percent federal sales tax, to replace all current federal taxes — is attractive in many ways. It is not a flat tax, but it is a flattish tax; it eliminates some (but by no means all) of the divide-and-conquer features of the federal tax code; it simplifies taxes for most households and many businesses; it might reduce compliance costs. All to the good.
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