A few yeas back several of them moved to netflix, and a few moved to airbnb and uber. I'm sure google still pays executives well above any other company, the people I knew at the time were fairly inexperienced and new to the field, and from what I heard google seemed to undervalue them relative to what other Bay Area companies were offering at the time.
Of course, this was a few years back, I'm not sure if the landscape has changed now for better or for worse.