tax cuts don't have to pay for themselves
only those who believe the government owns all wealth say that
and there are many good reasons for tax cuts that go beyond revenue generation
one involves castrating congressional power that has expanded far beyond waht the founders intended
a progressive tax system allows congress to buy the votes of the many by jacking up taxes on the minority that currently pay most of the income taxes.
once that starts there is no incentive to stop until the damage is irreversible.