"I see a consumption tax as being a little better than the personal income tax, and I would vote for the Fair-Tax if it came up in the House of Representatives, but it is not my goal. We can do better."
The good doctor almost never voted yes for anything. Willingness to vote for something is hardly a "warning", he just knows that he could do better than that.
I'm not really for it or against the fair tax, I just don't think people should vocally oppose it if they haven't read the book. I also don't like it when it gets misrepresented as a VAT, or whatever else.
Read the book, its a good read, even if you disagree. If you've already read it, then by all means criticize it. I just ask that you do so out of knowledge, rather than ignorance.
The benefit I see to the fair tax is that, since everyone pays it, suddenly everyone becomes more interested in limiting government spending. So long as we have a system where large sections of the population pay little or no taxes, they have no incentive to vote against excessive spending. That particular benefit could be had from any number of tax "schemes". The fair tax just happens to be one of them.