Well, I briefly interviewed Mr. Robbins today. [Robbins 'scored' the plan.]
...“If you cut out all the special treatments [in the tax code], you can cut the rate an awful lot. That’s a valuable message.” Cain, he said, merits praise for putting that message front and center in the campaign: “Give Mr. Cain the credit for injecting into the campaign a better way to go. You tax money once and only once.” That’s a great prescription, he said, for growth.
Robbins dismisses the "it can be raised" concern by reminding Hillyer that 'it would be sold as '9-9-9' and people will remember that; the backlash on a tax increase would be significant.'
Paul Ryan likes it because Cain has the guts to make a firm proposal; Robbins likes it because it works (although he might do it differently, given the opportunity.)
Why not? I'll tell you why not: the CPA and tax-attorney lobbies OWN Congress.