The less money you make, the bigger percentage of your income you spend on sales taxable items.
You haven't spent much time looking into the actual implementation of the FairTax legislation have you?
Spend some time at the FairTax FAQ for a while before speculating and throwing out kneejerk nonsense.
FAQ items 3, and especially item 48 address the specifics of your complaint well.
Instead of opening the political and administrative rat's nest of excepting specific items or persons from paying the NRST at the cashregister, the Fair Tax Act(H.R.25) provides what amounts to a personal exemption in the form of a payment for that all legal residents will receive a payment called the Family Consumption Allowence(FCA) as a sales tax rebate equivalent to the FairTax paid at the HHS defined poverty level of expenditure. The FCA is paid in advance, in equal installments each month by check or electronic tranfer to bank account from the Social Security Administration.
The size of the monthly FCA will be determined by the government's Poverty Level for a particular family size, multiplied by the tax rate, and paid to all households regardless of income or actual expenditure. The HHS poverty llevel is a well-accepted, long-used poverty-level calculation based on the cost of a healthy diet comprising 1/3 of total family budget value. The povertylevel statistic is fixed in 1969 dollars updated annually for CPI.