> Unions the actual solution
No, they are not. https://en.wikipedia.org/wiki/Dodge_v._Ford_Motor_Co.
Changing the table stakes is what needs to happen: see https://en.wikipedia.org/wiki/Mondragon_Corporation for a counter example.
Unions just create an us vs them mentality. The fact that the NUMMI plant ( https://en.wikipedia.org/wiki/NUMMI ) was not reproducible is a pretty strong indicator of that.