Kapo
Even though they were not paid, the kapos got special treatment. They did not have to do hard labor, and they were not physically abused like the other prisoners. They sometimes got extra food, cigarettes, alcohol, regular clothes, and private rooms. However, to keep this special treatment, the kapos had to keep the SS guards happy. If they did not control the other prisoners well enough, the kapos would lose their jobs. They would become regular prisoners again.