I'll answer, about 7 percent of the MSRP covers the labor involved in manufacturing. So a car that retails for $20,000 if built by slaves would cost $18,500. Cheaper yes but not astronomically cheaper. I am not defending unions, just trying to get you to understand the magnitude of the problem. It isn't as bad as you make it out to be. As far as PUBLIC sector unions go, they should be illegal.
I live in a city dominated by the CAW and union politicians. With respect, seriously, you sound like a union "economist". I would really like to see your reference for that 7% figure.