mutually consenting self-organization (even if it has a hierarchy). . .what's the issue? I have a company, so I hire you. I am the owner, and you are the employee. You are free to leave and I am free to fire you (unless we've entered into contractual agreement otherwise). *fails to see the problem*
As long as the proletariat has dissolved it is okay as workplaces built on coercive power relationships will have to face competition with workplaces that aren't. Until then, wage slavery remains a risk.