Criminal society

I had an idea, which is to gather all criminals in what I call a "Criminal society", and give them the necessary to survive, maybe, just maybe, with access to some form of entertainment. If they kill each other, I doubt anyone cares. Of course, they could not inflict any harm to others, that could be their punishment. They couldn't reunite with loved ones unless they do on phone. Everyone who killed someone or made crimes could be there. They could only go out if they met the required time inside or some of them could spend their lives there. This could very well be the plot of an anime, it almost reminds me of Deadman Wonderland. Everything I say by the way needs to be taken with a grain of salt, because I like to imagine. But I would like you to consider what I say. Because I don't like the current model of imprisonment; I always thought enjailing someone should be about taking that person away from the normal society, but not about making them feel bad.