I'm not familiar with Google's employee stock plan, but since -- I presume -- most employees are shareholders, don't they already have a say at the board level?
Disc: Googler.
Case in point, 68% of Facebook shareholders voted to remove Mark Zuckerberg, but since Zuckerberg's shares are a lot more powerful, it's completely irrelevant: https://finance.yahoo.com/news/why-68-percent-of-facebook-in...
Or put another way, it's a possible bonus if you and others like you do well.
Not investing in banks didn't make people safe from the financial crisis.