Why Did Classical Civilizations Need Social Inequalities?

Classical Civilizations seemed to need social inequalities for many different reasons. One of the major reasons was for the personal and economic gain of the elites, these elites didn’t want to do certain menial jobs that made the civilization function, but were often disgusting, so they would employ a lower section of their population to do it. These individuals in the lower bracket of civilization would often do jobs deemed undesirable, but necessary. The wealth you had, often determined your position, the wealthier you were the higher in society you were. In India, for the most part, the only way to move through their caste system was through gaining wealth because of how rigid it was, but in China, the main way to move up in their social