More, worse, and shorter imprisonment. No rights (can't get visited, no parole, no voting, no letters or calls, daily body searches), have to work in a manner suitable to your violence. Gradual reintroduction of "rights" when term is up (i.e. you have to stay free of crime to gain your freedoms back - should take decades). Repeat offenders get double punishment, Third offense death. The work should make a profit that pays for the jail and the courts you made necessary.