People deciding working conditions for others is not absent from all other systems.
In response to my comment asserting
Unless you have some argument that capitalism somehow provides some specific cause to enable exploitation which is absent from all other systems …
you stated
capitalism enables exploitation by allowing people who own capital to decide working conditions for people who do not
which appears to be you attempting to make that argument.
No, the argument being made is that having a handful of oligarchs who own capital make such decisions leads to exploitation. People who have been appointed democratically by the people to represent them deciding such things is a completely different matter. A government in a communist society represents the people, and the means of production are publicly owned by the people. That’s what prevents exploitation that capitalism enables by allowing people to rule over others.