"Ford/GM don't own their own plants" I stopped reading their you have no knowledge of the manufacturing world.
I don't know the specifics about Ford/GM, but I do know the Chrysler Group owns some of their plants. There may be others where they lease the land and building, but they are still managed by Chrysler. While Ford/GM might not "own" their own plants, they are managing them. They determine which model is manufactured at each plant, and what shifts are working. These aren't fast food franchises not owned by McDonald's or manufacturers like Foxconn.
Completely false statement right there. Like i said i work for a tier one supplier for the automotive industry and we own all our plants. The only thing Ford/GM/Chrysler/Honda etc own are the shipping racks we send parts to them in. We have a several plants that supports the Chrysler plant in Toledo Ohio and we own the building and the several others surrounding it completely. This is my job, this is what i'm in charge of so i know what i'm talking about, who is talking about Mcdonalds and Foxconn except you? Also i've traveled around many plants that manufacture all types of products as part of best practices we have an electronics divsion that works the exact same way we do.