Prisons don't work. In most parts of the world prison systems work the same and they really don't work at all and instead makes the whole thing worse and thus grow this business.
Norway has a different way of addressing this issue and do not run things the same way. As a matter of fact they have one of the very lowest crime rates in the entire world. I'd like to suggest you view the following video and you can see there is a better way that dose work.
It's time we stop running prisons for profit.