You are a sadist...
Fortunately, you are not a member of the CommitteeTo some extent, the system you presented could work.
The basic punishment would be at a high level and with good behavior, in the long term it could be reduced step by step.
If there were behavior problems, the level would be raised quickly and relief would have to be "earned" again, even if it was harder each time.
But I don't want such a system here!
Funny how mind works... Yes, I do have sadistic mind... that likes to develop evil things and help other subs etc to get in more trouble if needed. Then again, I would much rather at least at this moment, be there as inmate like wrote earlier, than committee member, thou I could always give them evil ideas.