> On the other hand, almost a majority of people already pay no federal income tax anyways.

That's an irrelevant diversion though, because the measure that matters when discussing the fairness of taxes is how much people are left with at the end after paying whatever taxes they pay, including sales tax, income tax, and any other kind of tax. And for those particular people you're talking about the answer is very little, next to none, and for the people for whom a wealth tax would even apply the answer is unimaginable amounts.