You might well think that the management of such a vast number of prisoners would have required an equally vast army of guards and supervisors. In fact, whole weeks would pass by without anyone in an SS uniform so much as appearing inside the barrack-huts. It was the prisoners themselves who policed the camp-cities. It was the prisoners themselves who supervised the internal routine, who made sure that the rotten, half-frozen potatoes ended up in their own saucepans while the good-quality ones were set aside for army supply-bases.
The prisoners themselves were the doctors and bacteriologists in the camp hospitals and laboratories, the caretakers who swept the camp pavements. They were even the engineers responsible for providing the camp with light and heat, for maintaining the motorized transport.