Class status and power hierarchies obviously play a major role. But privilege doesn’t always protect an individual. In the Roman Empire, slaves working in the lead mines had short lives. On the other hand, the elite used water from lead pipes, used lead dishes, and sweetened their wine with white lead. Some argue this is what caused the decline of the Roman Empire, as the elite were brain-damaged from lead toxicity — just a theory. For a modern example, look to the work of Keith Payne in his book The Broken Ladder. The data shows that high inequality causes problems in society for all involved, poor and rich alike. Sure, the poor get the worst of it. But Payne shows that even the rich in high inequality societies have on average worse rates of mortality, depression, drug abuse, etc as compared to the rich in low inequality societies.