The big tax in the US for most is Federal Income Tax.
The transistion would be hell.If we went to a sales tax or VAT, what about all the regular saving or Roth accounts that taxes already been paid on. Should you be forced to pay again, what's the fix. The "Fair Tax" overcomes the progressive problem by sending everyone a check for the amount of sales tax on $40k or whatever amount they decide on. And then everyone pays the full sales tax amount. Just hope we can avoid income taxes and a VAT tax.