Remove the gym equipmentm the a.c. & the tv. The only book would be the Bible & maybe the constitution. Cold sandwiches for breakfast, lunch & dinner. No medical care other than comfort care - an aspirin. Permanently attach electrodes to the genitals. When they get out of line, zap ‘em!
My prison reform platform!
When I was 18 I spent a few days in jail in West Memphis, Arkansas for minor in possession of booze. They served powdered eggs for breakfast and bologna sandwiches for dinner. There was no lunch for those who weren’t assigned to a work detail. I learned my lesson.