I worked for the incredibly shrinking DuPont. ERISA insures pensions but pensioners are worried about them and they could lose the promise of health care support. The company refuses to talk to the lawyer hired by a large group of retirees.
I think your description more accurately fits companies like GM because it was not the unions that did in DuPont but the vulture capitalists and concern about them. A good company puts customers first, employees second and shareholders third. When the shareholders are put first a company is guaranteed to go under. DuPont had unions but not company wide enough to stop business. I friend from R%D in another department had to work in a plant that was on strike. He thought it was great with
12 hours on and 12 off living in the plant for a couple of weeks because it paid him enough to buy a new shotgun.DuPont had a long term business plan of bringing forth new products using R&D and engineering with existing products paying for it. This was for keeping a strong family company for its heirs. When the family grew fat and rich, the business managers put the shareholders first so they could maintain a steady profit. When I started there a business downturn caused belt tightening but in today's atmosphere caused blood letting.