Right. This isn't a thought experiment: it's been shown that rehabilitative criminal justice systems result in lower crime rates and lower rates of recidivism than punishment-oriented criminal justice systems. Again, I'll point you towards the Norwegian system, where even Breivik was sentenced to 21 years with five-year extensions should he be judged unable to re-enter society, the "maximum indeterminate" sentence under Norwegian law. He with near-certainty will never be allowed back into society. But only
near-certainty, not actual certainty. He's even been allowed distance entry into the University of Oslo's Political Science program while being held. And there was almost no outrage whatsoever within the nation, even among families of his victims.
For further comparison, this sentence is only given for those who are a danger to society as a whole, mass murders or other severe violent offenders that have been judged otherwise sane and for which rehabilitation is unlikely. For all other crimes, the maximum determinate sentence under Norwegian law is a strict 21 years, with unsupervised weekend parole after a third of the sentence has been completed and potential for early release after two-thirds has been completed. Most prisons are open-air facilities without containment, without deprivation of resources, with open interaction between guards and inmates, with open unrestricted vocational training available for all inmates. They don't even remove knives from the open inmate kitchens. Look into conditions in
Halden or
Bastoy Prisons, two of the major ones in that country.
And it works.
The rate of recidivism in Norway is only 20%, compared to over 50% here in the US, and
the crime rate itself, especially violent crime, is significantly lower as compared to the US.
The evidence is solid:
strict incarceration increases recidivism, rehabilitation with a goal towards eventual re-integration reduces it.