Largely it'll come down to how much money he wants.

His salarly will probably be in the 6-figures, but he'll be a millionaire many times over. He joined Google in 1999 (IPO was in 2004), so his stock will have made him a very rich man.

Way off. He's a Senior Google Fellow and his bio used to be on the executive leadership page of Google (I can't find that page any more). He is being paid on the order of 10MM per year, base, easily.

Perhaps, I doubt his salary is that high, but he'll have significant amounts of of stock grants, options, etc.

Executive compensation is a very odd area, as I said, it pretty much depends how much money he wants.

Yeah I should have been more clear. But I'm pretty sure his equity alone is more than $30M / year.