Ok, that makes more sense. So, I modify the question to be U.S. workers threatening mass suicide by gun or whatever with a good number at one plant over time. Then, the plant starts taking preventative measures against various suicide equipment instead of investing in working conditions.

This actually has more odds of happening.

You'd probably have to go back a ways to at least the early 1900s I'd guess to get the right combination of horribleness to get that. These days workplace suicides are relatively rare 1-2 per million workers. Also being poor sucks but US workers are waaay more mobile than a rural Chinese person who move into a company town from their home town/village so before they'd get to 'I'll kill myself in protest' they'll probably get to 'I'll change jobs or quit' first.

That's what I'm thinking. Commenter talking like the situation in China and in the U.S. are equal seemed way, way off.