If you paid tax on gross income only this could work. But because the government can't know your deductions it would only work if you disallowed deductions for

If you paid tax on gross income only this could work. But because the government can't know your deductions it would only work if you disallowed deductions for expenses etc. Businesses might not like that. There are also a lot of decisions to be made on how you handle specific situations, like standard deduction or actual expenses for your auto.