No offense, but no matter how fast the employees ram the parts into the vehicles, it doesn't fix cheap/crappy parts.
I don't think the workers are to blame for this, nor the unions. It's corporate execs making horrible decisions, looking for the cheapest way to make a buck.
The company I work for is doing the same thing. Clowns from head office who have never seen meat outside of a restaraunt are sending us instructions on how to do our job. Their way doesn't work in the real world, but they can't see that. Mostly because they've never entered the real world outside of their limo!