From what my accountant tells me, there's a good chance the people inside the Google bus (driver excepted) are making 10-20X what the folks protesting them are making.
I assume that people who are fed up enough to protest and block a bus are making quite a bit less than $37K. I know lots of people who are making less than $37K.
I also know that many, many, many people at Google are making >$300K total comp.
Maybe all the salaries on Glassdoor skew low, but even doubling that still means 85% of Google employees make under 300k.
That's base salary.