On the outset, you might think with such ridiculously high compensation there would be an expectation of quality, but I think that's an error.
Google operates as an ad-company that happens to employ ridiculous amounts of exhorbitantly compensated individuals to engage in market and technological research, particularly to open or expand markets for their ads.
They didn't create mail, docs, drive et al in order to create productivity apps, they created them to _open a new market_ for advertising, and to gather data for the same. They don't really care what content is in the browser so long as it is browser-based content the user consumes and not native apps. The more browser time spent, the higher the likelihood of being served Google ads, or providing Google with data, and similar.