The FairTax is a consumption tax unilaterally applied to all Americans at the same rate. For businesses, payroll taxes would no longer exist. Our exports would include a heavy tax for overseas buyers purchasing our products, while our imports would be cheaper for us to purchase. I'm not sure how this would affect GDP, as more information is necessary.
According to the FairTax website, "Under the FairTax, every person living in the United States pays a sales tax on purchases of new goods and services, excluding necessities due to the prebate." The prebate gives every legal resident household an "advance refund" at the beginning of each month so that purchases made up to the poverty level are tax-free.
So a family of four making something like $50,000/year should not have to pay taxes, thus preventing an unfair burden on low-income families. Since the FairTax eliminates both federal and payroll taxes, you get to keep your gross pay amount of each paycheck earned.
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