Perhaps pigdog can provide that link to the calculator?
In any event your decision is solely on your net purchasing power?
Your after tax savings will be taxed when spent. That is not in question.So would the money he's already paid tax on. The income tax would only tax the interest earned, the sales tax would tax it all...again!
Put that in your phony "effective tax calculator".
At this point I'd have to say yes, because I have only a few years of income earnings, and mostly savings to fund my future spending. A fair tax could of course give me an exemption from taxation for the after tax savings - a prebate on such for instance - and I could go along with it. Otherwise it is huge theft from my lifetime of thrift.
Put that in the bill, a prebate for after tax savings at the tax exclusive rate.