If you work for a state-run and state-owned prison, then even more so we need to hold the administration and the civil servants in charge responsible.

That doesn't make it acceptable to beat prisoners; it means we have more legal authority over your bosses to make sure prisoners aren't mistreated AND to make sure you have enough coworkers to ensure that happens.

This seems like it places blame in exactly the wrong place.

It's a good thing that unjustified use of force won't be tolerated.

If your prison doesn't have enough staff, blame the owners and the administration. Don't blame the ethics; if it's a for-profit prison it's already by definition a completely unethical workplace