>if the business decisions were led by workers instead of a group of tyrants it'll most likely be a better decision.

I don't see how. The workers will want to work on things that they enjoy, or that make them look good, regardless of how much they help the company's bottom line. Why would workers not want to build mini-empires of their own? If you're thinking that other workers in the company would vote them down, the problem with this is idea is that other workers in the company won't know about or understand why this time-wasting group is doing what it's doing, because it's not part of their competency. Do you keep track of business decisions and happenings in some other group in your company (assuming you're in a large organization)? Of course not; you don't have time to keep track of everything happening across the organization. So why would workers in your worker-led company do any better?

The entire point of leadership is that individuals don't have the time or expertise to know all this stuff and make smart decisions.