Essentially, the Supreme Court ruled that Henry Ford had to operate the company in the best interests of its shareholders, not his employees. It’s an awful ruling by the Supreme Court that has never been revisited.

It's one of a sequence of Supreme Court decisions (starting with Dartmouth College v Woodward and culminating most recently with Citizens United) that have led us down this path of corporate dystopia. For the full background, read this:

https://reclaimdemocracy.org/corporate-accountability-history-corporations-us/