I don't think these people can be rehabilitated.  They did try to start releasing them into a town in Florida. Perhaps they could do something like that. Release them into an area that keeps them contained, still sort of like jail, but something we don't have to pay for. https://www.dailymail.co.uk/news/article-2746472/Inside-tiny-town-built-sex-offenders-Photographer-captures-spiritual-safe-haven-Florida-200-convicted-sex-criminals-relatives-live-side.html