This one is a doozy when you think about it. Should justice make the victim whole again? Should it harm the perpetrator for the sake of revenge, or only as a means to prevent future offenses? What type of sentences or treatments really do lead to less offenses? What's cost effective? It's a lot to think about.
Its really simple. Make jails a living hell so people wont want to be in them. Problem is they are more like hotels.