The simplicity of this story has to make it appealing:
If you want to understand income inequality, you have to be willing to look at the bigger picture of what happened to wages after the introduction of mass-produced computer technology in the mid-1970s.
Various versions of this graph can be found all over the Internet and economists agree on the fundamental soundness of the underlying data. The graph basically shows that wages parted company from productivity in the 1970s. The epochal event that transformed economic reality in the mid-1970s was the introduction of mass-produced microprocessor technology, first in pocket calculators, then in affordable computers.
(Those confounding factors though …)