That's not a "mathematical error" at all. The prebate should not be included as spendable income to have a comparative basis between the income tax and the FairTax. With the same income under the two systems the only method of reasonable comparison is to not include the prebate as though it were spendable income since there is no comparable increase on the income tax side.
That's not a "mathematical error" at all. The prebate should not be included as spendable income to have a comparative basis between the income tax and the FairTax.Like I said, you don't want people to spend it. Of course, it has no value unless it is spent. And when it's spent, it is taxed, thus reducing it's value.