>http://www.latimes.com/news/politics/la-pn-herman-cain-florida-win-20110926,0,7418298.story
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>Herman's 9-9-9 tax reform idea is reason enough to elect him!
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>9% tax on corporate income; 9% personal tax rate; and a 9% federal sales tax

Is that federal sales tax on top of state sales tax?

It would have to generate a lot of revenue to offset slashing corporate and individual income taxes. (Needless to say, this plan is deeply regressive).