This topic comes up from time to time and I can only quote what conditions were like where I worked (YOI).
No Sky , no access to internet , TV in pad ,games thingy (X-box or similar) if they can afford it and behave themselves inside. Access to well-equipped gym.
So - unless they go to Education or have a job,(wing cleaner etc), they could spend all day playing games or watching tele - which is what they might have done 'on the out' anyway.
I'll leave it to others to judge whether that is too 'cushy'.