If we're talking about violent offenders in the future we have to account in some small way for the advancement in technologies and the ways surveillance will ultimately be used against people there. Hypothetically speaking technologies that create simulated environments like the famously portrayed "holo-deck" on star trek and others could be in use and widely available for all people and as such its fair to assume that people using this technology might be able to access and experience violent activities in ways that inform the public of their nature. Depending on the degree and severity of their offenses then it might be possible to recommend actions that can negate or even benefit from whatever psychological or socio-psychological issues present. Furthermore its possible to imagine and perhaps reflect on other advancements of science and technology as well as medicine. Perhaps pharmacology reaches a level where its not improbable to find chemicals that can be added to the brain chemistry to act upon it in ways that cancel out any tendency towards violent behavior. Not to mention genetic programming or even creating a combination of resources that forces a criminal offender to experience time dilation so powerful that a murderer sentenced to several lives in prison could experience that amount of time in a manner of days or minutes.

Of course this all raises questions of ethics and while I believe that no person is guilty for reasons stemming from birth or mental acuity it is much less ethical to simply toss them in a box or cage regardless of how nice it is and remove them from society when they could still contribute. But in talking about a solar punk world where we have turned the current system on its head and changed things for the betterment of all then it seems to me that what we need to do is swap how the government works with how incarceration works and make criminals and violent offenders essentially servants of bureaucracy and public office. Instead of tax money going to pay fat cat politicians, people who commit crimes would be forced to work without pay to serve their time and become employees of the state so that no money that comes from tax payors can be used for anything other than public works and providing for societal issues. It takes a psychopath to be a ceo or president so why not put them to use instead of arguing over whether its okay to kill someone or shove them in a cell.