That would be inefficient unless you plan on removing bad actors permanently. That would mean life-long sentence for all, even minor, infractions. This is obvio

That would be inefficient unless you plan on removing bad actors permanently. That would mean life-long sentence for all, even minor, infractions. This is obviously not sustainable. The goal is to remove bad actors by re-educating them to no longer be bad actors. It's the only viable alternative. The other goal is to punish bad actors, thus bringing justice back into balance.