Actually, trusty crews go out into the community regularly doing maintenance and cleaning duties. Even on school grounds. The prison receives nominal pay for this work, but its more of a reward program - a privilege earned for good behavior and trustworthiness. As I stated earlier, most of the prisoners have been convicted of violent crimes. I'm sure we would be appalled to know that some previously violent prisoners, some murderers, are on work crews in and around citizens. Apparently the warden's program has been successful.
As for BSL working the system, I think after the normal 6 month isolation learning program, he will at some point fit in with the general population, be assigned into a dorm, attend church services, be a model prisoner and 'earn' the privilege of a job working on the numerous large farm equipment used in the farming operation. That's unless he is subsequently tied to and convicted of some other crime.