I agree it's a complex scenario.

I will never agree that beating helpless and restrained detainees is an acceptable response to any scenario in a correctional facility.

There are things like taking away TV privileges or being demoted to janitorial duty that can be an effective deterrent to many behavioral issues in a facility.

I say many (as opposed to most) because our jails/prisons are regularly used to house the mentally ill these days which creates another layer of complexity. We should fix that problem and remove that layer first and foremost.