In this day and time, the courts may favor the worker. Not sure if that was true always.
Interesting thing. I saw a History Channel show on Ford and the development of the auto industry. One thing they talked about was how it was hard work, repetitive, and not ergonomic. In the early years, they had a hell of a time keeping workers. People would start and not stay long at all. Ford then had to start paying the workers more to retain them because it was costing them too much and threatening production. Auto workers were then one of the higher paying jobs around after that. They could afford to buy the cars they were making.
Now days, the benefits are all wrapped up in union agreements. I couldn't tell you if the work is just as hard today or not.