Good points but let me address in rapid fire.
I do not think the prebate is horrendous and even in the current income tax scheme should be considered and dump the multiple assistance programs. For years, many distinguished conservative economist have advocated this via earned income tax credit.
I agree with point #2 on the revenue neutral and would put in reduction targets. I also disagree with some FAIR tax people and want the sales tax itemized on the sales receipts.
I am not sure how a fed sales tax erodes local sovereignty any more than having local, state and federal income tax.
I also would never implement the FAIR Tax without repeal of the 16th ammendment. The ammendement to repeal the 16th ammendment should make it clear the federal government can not tax income to clarify in SCOTUS case law prior to 16th ammendment.
the prebate might make good sense as opposed to the various welfare schemes but it is another complication and just begs for fiddling to make it fair to this group or that group. That way lies BUREAUCRACY. Either FAIR or Flat would have to be done with an Amendment to make it stick longer than one session of Congress and FAIR would require several amendments given the tradition that Amendments address one issue. It would be complicated and endless fodder for lawyers and judicial usurpation. An alternative is to go back to financing the FedGov with excise taxes only which would turn taxing power over to the Chamber of Commerce. No. The LOW Flat Tax is simple, exceedingly simple to operate and would not need the bureaucratic monster to administer it.
Erodes local sovereignty because the way I have seen it proposed, it substitutes also for local and state taxes which leaves the states and locals depending on the FedGov for their income. That is the total negation of everything else the conservatives say they are trying to accomplish. And before or alongside anything we do with the tax system it is also necessary to repeal the 17th Amendment.