The difference between Johnson and those other yahoos is that none of the others was talking about substantial cuts in spending. All things being equal, a consumption tax would be easier and less expensive to comply with (putting a lot of lawyers and accountants out of business), so Americans would save untold hours of their lives and untold $ of their wealth trying to comply/avoid income taxes.
However, a 'fair tax' alone does not address the major issue of the day: spending. Johnson is not talking about increasing the revenue stream in order to avoid cutting spending, but rather to cut the spending to match the revenue stream.
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