Could you explain this more? To me this calls up indentured servitude, though I doubt that's what you're referring to.
As per Vector's explanation, though I think it should be hybridized with the jury trial system, which is actually a fairly good part of the justice system when people bother to really use it and have the resources to do so. Currently this all exists in some jurisdictions as an alternative to trial, i.e. the judge will defer your prosecution in exchange for completing the restorative program. Basically I'd want the restorative agreement to replace the sentencing phase of a trial.
You're speaking my kind of language but I also want to know if you have some kind of gameplan for turning Peckham into Japan kinda deal
Japan is an interesting case - a legal system that is extremely harsh and unfair but also extremely inactive, alongside a society with clean streets and organized crime. I think Japan is the way it is largely because of the practice of collective responsibility in modern Japanese society, literally to the point of cleaning the streets. And so even many criminals organize themselves in similar ways as well, and end up containing some of their own impact in the process.
Looking at some of the details about Peckham, it seems to me to be a racial ghetto. Not a big surprise in a political system ruled by the Tories that violence would result in that situation. Not to get all "just overthrow capitalism" on you, but the ideology of the Tories going in the garbage is a necessary step to do any of the other things you might need to make Peckham be Japan. As per my last post, the lowest hanging fruit is to abolish the bullshit crimes, leading to less violent confrontations regarding those crimes.
The full execution of a Sandernista/Corbynite political program is the next major step here - decomodification of food, housing, education, and healthcare the most primary of all. From there you need to use those systems as a lever to mitigate child abuse, which by nature they somewhat are but now you can begin targeting a more malignant class of abuser than those who are using their children as a stress doll. Also, offering therapy to traumatized adults and all people with criminal records served or otherwise should go here. The goal in this is to increase the proportion of healthy people to unhealthy people as fast as possible, which makes everything else easier.
Then do a big gommunism and make the BBC cry by devolving labor ownership to workers outright, and
be invaded by the United States then you can start directly increasing the wealth held by people actually in Peckham. Ownership of Peckham will alter the psychological relationship held by the people living there away from "not my fucking problem" towards "yes my fucking problem", and provide the resources for general cleanliness, not solving disputes through violence, etc.
I don't know much about the UK's legal system save that they recently passed a law making it legal for cops to do terrorist attacks and there aren't jury trials, but you should probably do jury trials. Restorative justice methods for petty crime will serve to make both the perpetrator and the victim less sociopathic, and possibly better the sense of social solidarity that all the previous is meant to cultivate.
Preaching to the choir; I was interested if there was some novel way we could forgo the whole prison system entirely, even factoring in assholes, compulsive killers or ambitious terrorists long after the career criminals have moved on to civil careers. Mental health taking over with involuntary incarceration feels like rebranded prison, and it doesn't seem right to be trying to "treat" those criminals who are perfectly healthy and have a 0% of leaving hospital detention because a healthy person can't prove to a psychiatrist that they're healthy, least of all after they've done some heinous crime
Compulsive killers tend to be made by child abuse synthesizing with adolescent sexuality, in all the research and history I've ever read. It's actually a startlingly clear trend. I think this is solvable with the methods described.
Assholes/narcissists/personality disorders might be solvable - surprise, surprise, most people like this I've ever gotten close to were abused as children as well. Even otherwise, people like this can provably reform their behavior. Even antisocial personality disorder and the like can be reasoned with, and some people like this are highly society-abiding even if they don't "feel" it because it's rational to cooperate. Identify in school, early therapy. Now that I mention it, it might be good to have a psychology class as standard in education, and just teach all children therapeutic methods and common pitfalls.
Terrorists are a political problem and should be solved through political means. This is a global thing and might actually be the most late-stage of all to be solved, depending on what you think about the resolution of the modern political conflict. Nonetheless, people adopt political ideologies that do terrorism to meet unmet needs. Trying to meet needs will filter out most, uh, "casual terrorists". Oh, and don't let the police do terrorism.
I also disagree with involuntary commitment in most circumstances. I'd relegate this to a possible ending of a conviction at trial for cases where mental illness was demonstrably a source for the criminal behavior, and in the event someone has a psychotic episode, though healthcare provision can minimize this.