Where do these $1 million tract house valuations come from, if the middle class engineers can't afford to buy them? It would appear that they're mostly owned by people that have been living in the area for the past 20 years? And because people have not moved, even though they are apparently no longer in the middle class, the supply has been constrained and the few houses that do go on the market go for extremely large amounts of money.
Anyway, I'm not sure what to make of the article. There are troubling comparisons, and glimpses at incredible wealth, but the parts of the article don't seem to fit together very well into a picture of what's going on.