In the context of humanity. People do this even in non-capitalist countries. Or do you think that when a country is not capitalist the people suddenly stop doing things to benefit themselves?
I would argue that this is a perspective of someone with power in the job market, and perhaps that perspective is limited to a small portion of workers' experiences.
I also find "don't like it, leave" to be a very unaware oversimplification of the situation many American workers are in.