It’s not so much a reward. It’s just the natural outcome when your intent is to stop crime, and not to be cruel with punishments. In most countries it is still culturally taboo, but treating people well is the first step to stopping them from committing crimes. Mental health attention is only possible when you work with person who is being treated with basic human dignity. Antisocial personalities of course are an exception who commit crimes and trespass social norms out of different reasons than common criminal but they aren’t actually that frequent or common. Crime is a complex multifactor issue. More often than not it is a mix of unmet needs, opportunity and the belief that they can get away with it. If you fulfill the needs of the person in a socially acceptable and healthy way then reduce the open opportunities for crime, you can stop crime before it happens. Punishment and its harshness, on the other hand, have absolutely no impact on crime rates.