FairTax only addresses regressivity up to the poverty level. Its proponents specifically cite the way it would affect investment and savings, which are the doma

FairTax only addresses regressivity up to the poverty level. Its proponents specifically cite the way it would affect investment and savings, which are the domain of the wealth(y|ier). People earning median household income would face a much greater tax impact than people earning 10x that level, which is precisely what the progressivity of income tax with marginal rates is intended to avoid.