Like a sibling of my original comment, human morality is optimized for small tribes. In my opinion the point of the slogan is to instill some anarchy into the listener... some weariness of top-heavy hierarchies. In my experience, it seems that the existence of a top-heavy hierarchy is necessary for, and too often sufficient to ensure, widespread exploitation. It's relatively easy for one desperate person to rob their neighbor. But a hierarchy will allow you to convince normal people to participate in the robbing of everyone two towns over, or in protecting a powerful studio executive, or dehumanizing detainees, or...