No: as far as I understand it, the FairTax would eventually be the only tax collected. The 999 plan is one of several intermediate tax steps. The 999 plan would indeed collect taxes on top of the ones we already pay, including taxes from people whose incomes are too low to pay taxes now. But the FairTax would do away with the IRS. Of course, states would still be free to levy their own local taxes, I think. It's complicated.