Also, remember that time that Google, Apple, and "dozens" of other companies colluded to prevent each other from hiring talent from each other, in large part to defraud their own employees of opportunities (to the tune of an estimated $8,000,000,000)?
So it seems like there's a small group at the top that does whatever the hell they think they can get away with, then a large group in the middle that is more-or-less exploited by the top group, and another large group on the bottom that are more-or-less totally fungible and who are almost completely ignored by design by the other two groups.
Most of the people in the "middle" group are either clueless about their exploitation, or complacent, and what we're seeing in TFA is a fraction of the former becoming the latter. I suppose a tiny fraction of people might actually quit Google over this.
(I worked at the Google-plex for a couple of years as a TVA, a kind of half-life role in between a normal Googler and a service staff. It was a very weird experience, and afterward it felt like I had been kidnapped by aliens and returned to Earth.)