All those sorts of flat tax ideas tend to fall down when considering how 'income' is calculated. Unless the policy says the state gets x% of every dollar of re

All those sorts of flat tax ideas tend to fall down when considering how 'income' is calculated. Unless the policy says the state gets x% of every dollar of revenue, which creates wild disparities between industries with different margins and generally upends the idea of 'income', such a policy is quickly in the business of deciding what expenses can be netted against which sources of income by whom ...