Bruce A. Liller, Chief of Psychology at North Branch Correctional Institution in Maryland explains why, despite the higher security risk of allowing inmates out of their cells during the day, the practice is necessary. Even though North Branch is a Maximum Security institution, the inmates are not on lock-down 24 hours a day. As Dr. Liller suggests, the psychological well-being of the inmates demands some movement and involvement in activities such as working in the cafeteria, visiting the library, or exercising in the yard. [x]
LTMC: This is the reason why Mississippi was able to shut down one of their Supermax facilities in 2010. They let the prisoners out of their cages and allowed them to move around, play, work, be in the sunlight, and so forth. Each one of those prisoners was supposedly the most dangerous inmates in all of Mississippi. Every one of them was eventually moved back out into the general population. It reduced violence, increased officer safety, and saved the taxpayers money.
When you treat people like animals, they behave like animals as well. It just so happens that treating them like human beings is more cost efficient.