But that only happens because automation and globalization are barely harming the US. And its not like the oligopoly is not trying - why are there so many appeals for more H1Bs?
If you need skilled workers and the varying skill of a worker produces magnitudes of difference in wealth created of course you need to both be huge enough to afford them and centralized enough to take advantage of them.
The article itself seems like a blinders on interpretation of the US tech industry. Corporate consolidation is at all time highs in areas like food processing, farming, finance, raw materials, and industry. Mom and pop shops the world over are bellying up for Walmart and Starbucks. Startups and creative culture in the tech bubble are against the general grain. Its why money in politics is being considered such a larger problem now than twenty years ago - as dozens of economic effects interact, from people having less spending money to companies consolidating and having guaranteed revenues to regulatory meddling in their favor.
Fundamentally I think that newer generations growing up on the Internet are turning out much more hive minded than their grandparents, because there are just more of them as a fraction of the population. The perfect white nuclear family of 1970 still only accounted for a stark minority of the American public - it is just strange that a disproportionate number of people on HN ended up coming from that class. There was still extreme social unrest throughout the century - prison camps for the Japanese, the KKK, segregation, and the banning of many chemicals due to being "foreign" like opium and marijuana. Just because one microcosm of the American economy that produced most of us was homogenistic doesn't mean the era was exclusively defined by it.