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Re:Yahoo spends $58 million to fire its chief operating officer by TheCoelacanth on Thursday April 17, 2014 @04:46PM (#7606209)
The bottom 50-90% of the top 10% of earners is very much part of what is traditionally called "middle class". People in high-paying professional occupations such as doctors, lawyers and engineers have always been considered part of the middle class. The upper class is made up of capitalists and high-level executives, not people who work for a living.

Source: http://en.wikipedia.org/wiki/American_middle_class#Academic_...

Re:Yahoo spends $58 million to fire its chief operating officer by bronbron on Sunday April 20, 2014 @04:49PM (#7618431)
Interesting! I didn't know there were different distinctions.

Still, I think your source really just proves my point: by no means is anyone earning 120K a year "solidly middle class". By pretty much all of the definitions you listed, 120K a year would either be "upper middle class", or "the rich" (e.g. find me a homeowner in SF who doesn't have >1 million in home equity).