It is not "obvious" to me that for instance Google is particularly partisan. Most big companies donate to both USA parties in large quantities, because they know they need to buy the politicians whoever is in power. I haven't looked it up, but I assume Google is similar in it's lobbying.
The largest companies are almost always mostly looking out for their own profits, and use their not inconsiderable power mostly to that end. And that's not unprecedented. I don't know if it should be less worrisome that we accept that uncritically!
(Btw, to say something is unprecedented and call it "robber baron style" is a bit confusing, since the term "robber baron" as applied to industrialists/capitalists is over 100 years old! Whatever the "robber baron style" is, it originated in the 19th century! so not unprecedented)
That's what a dangerously broken society looks like. The common folk should never be openly supportive of "robber baron"-style political activism and it's unprecedented AFAIK.