Why exactly does a VAT (which is what this is) point in the right direction?
Why would it "eliminate the IRS"?
In nations that have this (and there are a number) there remains a significant bureaucracy devoted to computing and assessing and trying to find the cheaters, and finding, collecting and disbursing the money. And of course armies of lobbyists who successfully ask for and get special exemptions and rates on this and that and whatever.
The issue is never "what are the tax rates", but "what exactly counts as income or taxable transactions". That is always the hard part and subject to cheating.
It is a transaction based tax that's more complicated than sales taxes, and puts burdens on the suppliers of services.
The only people it really really benefits both economically, and in bureaucratic burden, are really rich who can live off their dividends and bonds, and still have enough to compound by saving more. (Which I think is the point. Who wins? Why? Poor and middle class spend most of their income, because they have to. This hurts them more.)
There are plenty of ways to cheat on the VAT too.
The criticism of the FairTax from that guy is even more insane, on the other hand.
Like this one:
"Taxation is nothing but organized theft, and the concept of a 'fair tax' is therefore every bit as absurd as that of 'fair theft.'"
About the same way that surgery is the same as "aggravated mayhem."
People actually want some government services.
I personally believe that the SS and medicare taxes (on wages only) should be eliminated on both employer and employee side and all shifted to income tax, and, capital gains, short and long, and dividends, and interest income should all be taxed equally, as was done in Reagan's 1987-88 tax reform. (There is no very good economic reason to tax differently I believe).
Because capital gains are often lumpy, then you would be able to put off half of any gain and spread it out over the two succeeding tax years, automatically. This intrinsically gives a benefit to capital gains.
This may smooth out government revenue as well.
Capital losses should be deductable against up to half of income.