His argument is for an aggregate middle class that outspends the elite because without a large middle class there is no Market. His conjectures are much less about building an elite plutocracy as they are about maintaining a strong middle class to support robust economic growth.
In fact, the book specifically says that what happened to musicians can, and will, happen to other sectors of society, specifically spelling out how surgeons may be replaced eventually by robotics.
The argument is not against technical evolution, but rather against a spying society. The headline, as is usual for QZ, is inflammatory, and people like to grab onto Jaron's most flamboyant statements because of how he looks, but his ideas are a lot more reasonable than your post makes them out to be.
In short, I don't agree with what Jaron says, but his points are about the growth of a middle class that he sees as an artificial construct, but one that modern society cannot function without.
TL;DR: Jaron says some crazy shit, but he's mostly arguing for a robust middle class. See his repetitive mentions of Henry Ford making cars affordable for his factory workers.