For the past thirty-five years, the debate on fundamental tax reform in the United States has centered on whether some type of consumption tax would replace all or part of the federal income tax. In my opinion, this debate has now been decided. Given recent budgetary developments and the impending eligibility of the baby boom generation for Social Security and Medicare, we cannot dispense with the revenue from the corporate and individual income tax. Moreover, we will need huge amounts of additional revenue, and most informed observers believe that the only plausible source for such revenues is a federal value-added tax (VAT) enacted in addition to, and not as a replacement of, the federal income tax.
Avi-Yonah, Reuven S. "Summary and Recommendations (Symposium on Designing a Federal VAT, Part I)." Tax L. Rev. 63, no. 2 (2010): 285-300.