The prison industry is more lucrative than you think.
http://www.alternet.org/civil-liberties/23-million-americans-rot-prison-meet-corporations-exploiting-them-profit?paging=off¤t_page=1#bookmark
http://www.theatlantic.com/national/archive/2013/10/how-prisons-change-the-balance-of-power-in-america/280341/