If a prisoner costs $50k a year, and "if" he would work a job where he would make $50k a year and if he didn't receive a dime from it, does it look to you like a free labor? He merely makes up for what he costs the system, not taking into consideration the likely damage that he has done that made him end up in prison in the first place. And I don't expect prisoners to have anywhere close to $50k salary jobs.