Under the current system, when I spend savings, I do not get taxed at the 25-30% fair tax rate. You are avoiding the issue. Those who have after tax savings in certain forms (perhaps not housing, as used housing will probably see an increase in value as alternatives for taxed new housing), will be taken out and shot by this change.
I also said that there are mitigating factors. For example, if you have any pretax savings (401k, 403B, etc), they will get a big gain. Why are you avoiding this issue?
Also, any cap gains you'd have to pay on sale of homes, stock, or other cap assets will be gone. Why do you avoid this issue? Also, you will be able to pass on your fortunes to your heirs without an estate tax. Why do you avoid this issue?
Perhaps some other FairTaxers can add some insight ... but don't be sidetracked by the scare tactics of FairTax opponents that "everything will be taxed by 30%" (or even more with some of the detractors.
It is the effective rate rather than the marginal rate that is important in determining purchasing power.