If the basics are such a special class, why should we pay for them at all?
There you go, comrade. Phase II. Increase the prebate to not only cover the tax on basics but the basics themselves. Simply change it to, "Nobody, not even Bill Gates, should have to pay taxes on for the basics of life".
Given that we'll eventually see the Fair Tax equal to the cost of the good itself, Phase II won't really cost that much more.