I reckon it´s not only money that they give value. Other intangibles might apply (as all family related issues).

I agree that engineers might also have something to say, but we don´t actually have a clue if some of them actually expressed they concerns for this change, unless you have some insight from inside the company that you may not be able to share.

Even if some of them left as you suggest, I´m pretty sure Google wouldn´t have any problem to find some other engineers that would happily implement anything without questions.

Nevertheless, I agree that concerns should be raised by everyone in the org, but the only ones that might lead to an actual change is stock holders/board of directors.