Strictly from a business POV, gangsters who do murders are the last people you want to lock up with expensive equipment. They don't want to be there & have way more experience busting heads than you do.
You want nice, quiet people pleasers who will do what they're told- with minimal supervision.
So check out the ratio of workers to wardens in there. It looks like at least 20:1. Could be up to 40 or 50:1.
They *know* those folks aren't a threat to anybody!