Federal prison guards often have bonuses based upon their UNICOR (the Federal slave labor corporation) work detail's output. Think about that. The prison guards, who have a financial interest in the UNICOR output, control every detail of these guys lives.

'Hey guys, anyone who wants to volunteer to work overtime can. Also, my bonus depends on it. Anyone want to bring up any safety issues that might slow production? Also, I will be working the UNIT night shift all next week.'

Also FYI, UNICOR does CAD work for McDonalds remodels. Knowing that it kinda makes sense why McDonalds went from bright happy places to the dark, dreary places they are now.