Sen. Rand Paul says the United States should adopt a flat tax that would greatly reduce the need for the scandal-marred Internal Revenue Service and eliminate "most if not all" of the agency.Following revelations of the IRS's targeting of conservative groups, Sen. Ted Cruz and former Alaska Gov. Sarah Palin have come out saying that it's time to abolish the IRS.Sen. Paul tells Newsmax TV in an exclusive interview: "What I've promoted is a flat tax, 17 percent for individuals as well as corporations with about a $50,000 deduction for families, similar to what Steve Forbes promotes."If we had that kind of simple tax deductions or simple tax form where it was one small card, you multiply your income by 17 percent, you wouldn’t need much of an IRS."So I'm for eliminating most if not all of it. But you can't just say we're going to keep the current tax system and get rid of the IRS. You've got to get rid of the tax system."We have to go a much simpler tax code and then we can, yes, try to get rid of or significantly downsize the IRS."See the video below: