There's an easy way to make room for the violent offenders.
Send them to their Maker.
Actual penalties for crime would be a nice start.
If it were up to me virtually all violent crime would carry the death penalty as at least a possible sentence. I don't even care if it's a deterrent or not, it guarantees that at least that person is "deterred".
So to answer "What can we do?"
We should be pushing for harsher penalties for violent crime, for one thing.
Still happily answering to the call-sign Peetza.
The problem, as you so eloquently put it, is choice.
He is no fool who gives what he can not keep to gain what he can not lose.
-Jim Eliott, paraphrasing Philip Henry.