Most people don't know the poverty line though.
Also, to build off that monthly budgets, one thing they found on The Fair Tax was that talking about the rebate in yearly figures, even though it was given monthly, people would think they were getting paid once a year like Shaq used to do with his NBA contracts, instead of every other week or even monthly. So they thought about $9000 or whatever it was, getting it at the start of the year and having to survive the whole year on it. Even though nothing in the plan required this even for people who didn't get money any other way.
I'd like to add I was not a Fair Tax supporter, but I did pay attention to their failed attempt to sell the scheme to people who should have favored it first because that was pretty informative and real time.