The Tax Redistribution Gap

The tax revenue gap—the difference between how much the IRS collects in tax revenue and how much it should collect based on the text of the Internal Revenue Code—is both well-defined and well-studied. But raising revenue is just one purpose of taxation; the tax code also operates to redistribute wealth. Drawing from the tax revenue gap and redistribution literatures, this article coins a parallel concept, the tax redistribution gap, to map the extent to which the tax system falls short of its redistributive goals. Introducing a tax redistribution gap measure challenges background assumptions in current tax discourse: first, it would call out a reliance on pre-market income as a distributive baseline, which serves to overstate the redistributive impact of the tax code; second, it would increase the profile of redistribution among policymakers and the public—understandably, measures like the tax revenue gap and tax expenditure budgets focus dialogue on tax evasion and over-spending by the government. Ultimately, the tax redistribution gap would provide a single measure that displays how we are falling short of a key task of the state (redistribution). And by understanding and comparing the component ways our current tax systems falls short of it intended outcomes, we can better tailor redistributive policy solutions.