Which is all the reason anyone should need to favor the abolition of the IRS. I favor a repeal of the 16th Amendment and believe taxes on wages are immoral. But even that can be separated from the question of how we collect taxes and how we enforce and prosecute tax evasion. A simplified code, with a simplified collection method would eliminate the need for audits, for the tax industry; would lessen the numbers of criminal and civil tax prosecutions; and would end the use of the IRS for political punitive aggression.
A flat, national sales tax. Nothing else federal.