The author correctly points out that the Bay Area's problems are political in origin, and that tech companies and technologists in general have been reticent to get dirty with politics.
However, their solution, putting tech companies under more democratic control, does not solve the problems specified.
Raytheon and Lockheed Martin's work is under democratic control. As are the zoning policies which keep out poor and middle class citizens from the few parts of the country which have benefited from our economic growth. The companies that charge our local state and federal governments 10x what Europeans to build roads, bridges, mass transit and build other projects are very tightly controlled by our democratic systems.
Facebook and Google are not preventing people from building housing. They are not building tools for the government to round up "undesirables", nor are they building drones that blow up civilians. They are building technology that allows advertisers to more accurately sell people stuff.
It should be obvious to anyone at this point that this could be used for nefarious purposes. But so can any number of other technologies developed over the past two centuries. The 20th century was a testament to how much murder humans can commit when given the opportunity, and we did not need machine learning to make it happen.