[MrJohz]

That works if the only ethical decisions relate to the workers, but there are still ethical decisions that relate to external factors like climate change or to customers. For example, a worker-run coal mine will probably be much better at maintaining safety standards than a privately-owned coal mine, but those workers still want a job! They're not going to willingly shut down the mine just because coal-fired electricity generation needs to be phased out. You still need government oversight and regulation.

(Of course, worker co-ops are still good things, even if they're not going to solve every problem all by themselves!)