The fairtax has as one of its components a mechanism to avoid individuals paying tax instead of buying necessities. It does that by "block-granting" taxes on necessity level spending.
There surely is an argument to be made here - do we want people having to pay tax instead of buy food, medicine, etc? Or do we want to exempt a certain level of spending [the same for everyone]?
10% tax across the board. No exceptions. Free rides must end.