House Ways and Means Chairman Dave Camp has released a complex 182-page “discussion draft” called The Tax Reform Act of 2014. Rather get bogged down in details, I will take this opportunity to review several fundamental errors that repeatedly plagued most past and present efforts to reform the federal income tax, including the Camp proposal.
One of the most pernicious errors among would-be tax reformers is to assume that, as the Tax Policy Center asserts, “tax expenditures are revenue losses” attributable to various “loopholes.” On the contrary, the Joint Committee on Taxation (JCT) clearly states that the estimated dollar value of any “tax expenditure … is not the same as a revenue estimate for the repeal of the tax expenditure provision.” As the JCT explains, “unlike revenue estimates, tax expenditure calculations do not incorporate the effects of the behavioral changes that are anticipated to occur in response to the repeal of a tax expenditure provision…. Taxpayer behavior is assumed to remain unchanged for tax expenditure estimate purposes … to simplify the calculation.”
One glaring difference between revenue estimates and tax expenditure estimates involves taxation of capital gains if those gains are realized by selling assets from a taxable account (unlike IRAs or most home sales). Estimated tax expenditures from not taxing realized capital gains at the top income tax rate of 43.4 percent is listed as a big revenue-losing tax expenditure, even though Treasury, the JCT and the Congressional Budget Office (CBO) revenue estimates would rightly predict that the behavioral response to such a high tax would crush asset sales and thus lose revenue.
Mainly because the artificially estimated “tax expenditure” from a lower capital gains tax is wrongly equated with estimated revenues, the Simpson-Bowles plan hopes to raise an extra $585 billion over ten years. In reality, investors realize fewer gains when the tax rate goes up, so the higher tax on fewer transactions means revenues fall rather than rise.