I agree that GM's problems are four to five decades old, and bailing them out was foolish. But the union added extra dollars to the cost of each vehicle, maybe on the order of $5,000/car, or more.
That, plus the lack of change to lead technological innovation instead of following technology produced by Japan and the Europeans, contributed to their current road to ultimate bankruptcy or Chapter 11 reorganization. GM is second rate at best right now.
The union isn’t interested at all in the quality of the product or the cost of it. They only care about dues-paying members. If a robot does a job faster and better, it doesn’t matter. They continue to employ ten men to do that job. The fact that they have to keep paying them and retiring them with pensions and huge benefits packages shows where their allegiance lies.!