Historically, socialism requires a central committee to organize the distribution of wealth and the structure of labor. Technically, it's a totalitarian form of government because it requires a centralized government in order to function. Furthermore, socialism is about forcing equality because it advocates public ownership of the means of the production and equal allocation of resources to an entire populace. Marx envisioned a socialist system where a central committee oversees this process, and then disappears, leaving only the people with control over the means of production; but every instance in history has shown that the central committee never resigns its power.
There is such a thing as libertarian socialism that says no governmental system should oversee the process; but it's nearly impossible to imagine how this coukld happen.