I feel there is no rational basis for this belief, and it's mostly guided by wishful thinking to fool yourself into believing that all this penance leads to some kind of salvation.
It doesn't.
There are highly paid professionals in other countries who benefit from higher worke protection laws and even public services like working national health services and free education. Virtually all European countries ensure greater workers protection and half have a higher human development index than the US, and FANG salaries in Europe often lead to far greater disposable income. Heck, I personally know a FANG who was forced to pay overtime for oncalls in europe while US workers only get the pager app and the shaft.
Also, being subjected to abuse is not a requirement for mobility. Mobility only requires that you can quit your job and apply for other positions. There is no piece in the equation that requires abusive revolving door hiring practices.
People should shed their victim mentality and stop fooling themselves on how the path to riches is through suffering. It isn't. Basic human decency doesn't need to be thrown out of the window. That's only a requirement to screw over workers out of their rights and livelihood.