Focusing on the one ara of already-taxed savings is a mistake. If your savings was 50% 401k and 50% after-tax savings, then you would benefit from the waived taxes on the 401k while you lose on the after-tax account.
All the taxes deferred on the IRA accounts are going to be taxed at ordinary income tax rates when you finally use them. And, of course, all savings get to grow tax-free under the FairTax regardless of how long you hold the investment, so you don’t need to fear turnover anymore.
Personally, my savings is 75% in deferred 401k accounts so not having to pay ordinary income tax rates on that money more than offsets the FairTax on my already-taxed savings.
So monetarily I would be better off, but the real reason we should switch is exactly what is in this article — the existing system is bizzarre and corrupt and it is time to start over. Preferably with something that addresses the changing demographics and disadvantages we have in the world economy.
So you have absolutely nothing saved outside of retirement accounts?