Worker co-ops: business without bosses

Aren’t these currently called Partnerships?
And we know for a fact that communism doesn’t work, i.e. the USSR
Co-ops can really only work on a limited scale, the bigger it gets the more difficult it is to coordinate. It would be difficult to have it grow into a multi-state, even multi-city company. Cant imagine a global company.
And is it supposed to be an equally shared company? Everyone being paid the same? From a newly hired assistant to a craftsman with 20 years experience?