
The book traces the historical development of the concept of whiteness from early Britain, where the Irish were considered non-white as a means to "other" and impoverish them, to pre-revolution Haiti, where people of mixed race could attain certificates of Whiteness that would grant them the same rights and privileges as non-mixed French people.
Those are just two of the anecdotes I remember from the book. It's really worth a read if you're into the whole "race as a social construct" thing, since it digs into the mechanics of how that social construct was created.
UNIONS
The nefarious angle of the work culture myth is that it perpetuates by our own hands, or rather, it is supposed to. Anyone who speaks out against it is a "unionist commie" or "lazy". It is self-reenforcing, where one group of workers is scared of losing their jobs so they attack the ones who want to unionize for better conditions.
FEMINISM
There's a similar analogy in feminism, where women who have internalized misogyny actively work to make sure other women don't try to upset the status quo in the name of liberation. It is why you sometimes read about women tearing each other apart because one might chose to not shave her legs or armpits, or wear makeup or heels to work: why should THEY be free of oppression when I'M NOT. Self-policing is very effective for the upper classes to retain control.
RACISM
It goes even further. Read "The Invention of the White Race". The idea of pitting poor white people against poor black people wasn't intentional: the hierarchy was constructed because wealthy land owners needed help policing their slaves, so they created the notion of white / black superiority which led to former white slaves earning their freedom becoming slave masters. (I'm simplifying, but that's the gist.)
Self-policing is highly effective way for those in power to leverage fear and keep the oppressed classes at war with each other and not the people exploiting them. Your comment is spreading that fear.
Check out works by W.E.B. Du Bois, Theodore Allen's 'The Invention of the White Race', Sherry Wolf's 'Sexuality and Socialism', Sharon Smith's 'Women and Socialism', and many more...