Real wages stopped going up in 1972, not the 1980s, and real wage are what matter.
http://www.pewresearch.org/fact-tank/2014/10/09/for-most-wor...
Unemployment also hit some record highs in the 70s:
http://data.bls.gov/timeseries/LNU04000000?years_option=all_...
So, I think to say that it was bad only for rich people is a very unusual... I think it was probably worse for poor people since they don't have safety nets. It was also the beginning of the end for real wages which have never reached their 1972 peak.
Those are some pretty large assumptions to be wrong on, for the rest of the article, so I'm not really sure how to take it...? Maybe the author can clarify for me?
Edit: better source for real wage data, and clarity.