The FairTax legislation goes to great lengths to make sure the income tax does not return. Read the bill here...
https://www.congress.gov/bill/117th-congress/house-bill/25/text?r=96&s=1
Do you think the Left cares one whit about what is in the “Fair Tax” bill? If they can summarily ignore the Constitution, they will certainly override whatever’s in the “Fair Tax” bill.