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Something changed in the US around 1980. I was there when it happened, and what happened was that the country shifted from a model that was a market economy at the macro scale but not at the level of individuals to a market all the way down (if you wanted it to be). 
Because the phenomenon of (mostly young) professionals trying to get market rate for their work was novel, a name was invented for it: "Yuppies." The reason that seems an obsolete 80s word now is that we don't need a word for it now; now we take it for granted.
A couple years ago I spent several months figuring out and describing what happened in the US around 1980. Unfortunately it has more than just economic implications. If you want to read more about it, see paulgraham.com/re.html
