The structure doesn't take mental illness into account. When a rule is broken, there is discipline and consequence. They are going to respond in fashion. But we as mental health professionals look at it differently. We see a man who is extremely ill, so ill he is capable of biting off his own fingers.
Institutional care is expensive.
It costs a lot to heat, staff and maintain. You've got to feed everybody. All these things cost money. I think the public asks the corrections system for security first - bricks and mortar and guards. Services are secondary.