If it was irrelevant you wouldn't make such a big deal out of claiming you have answered it. You haven't. I don't expect you ever will.
Do you have a list of economists who have stated their opposition to the FairTax?
You once claimed that if there were 75 who lent their names to it then there were 75,000 who thought it was stupid. You subsequently claimed that there were a total of 45,000 economists in America. Which do you want to defend?
Do you support maintaining the income tax and the IRS as they currently exist?
Frankly, you have been all over the place on this. But the one thing you have never done is answer the question directly.
Why do you think that maintaining the income tax would be better for America than adopting the FairTax?
The only answer you have ever given to this question is denying you support the income tax. But asked what you would support in place of it you claim you have answered that many times. You haven't.