The unions have just as much an incentive to help the company as the company has to help the workers. Both will have nothing without the other so they can’t extract 100% of the value, but they do want to maximize their take.

What I don’t get from your comments is why you think unions are bad because they can have bad actors, but are ignoring that the company’s bad behavior doesn’t go away if the union does. And this happens even for well compensated roles. Look at examples like when Apple, google, and a few other companies entered into a cartel agreement to suppress engineer wages.