Ah yes, they can put a uplifting phrase on all the entrances as well. Something like work will set you free maybe. That way you know the camp was built to help people and would be way better then just leaving them alone.
There are some other things that would need to be done as well though. How would the authorities know if someone was both working and had a place? Oh I know we can issue papers to each person that have their job and residence listed, that way all it would take is the local authorities asking everyone out “Papers, please”.
On what is a seemingly unrelated note, how much of a history buff are you?