I hardly think this is exploting the homeless,
In this tea party driven societal mandate to desocialize government benefits and make the downtrodden and unfortunate more accounatable for their plight and shall we say, independant, this sounds to me like a perfect example of 21st century mutually beneficial commerce.
I for one thoroughly embrace this shit, especially as I am not homeless.
It rather reminds me of now-Senator Al Franken's inspired idea detailed in his classic "Rush Limbaugh Is A Big Fat Idiot" to send seniors on experimental missions into space.