Uhm, they do make significant (>$40MM) amounts of money from cash+RSU compensation. [1-5] That's literally what you can find with a cursory search; no digging. Furthermore, the tax writeoff carries through 5 years since it was a stock donation.

And sure, use 54.4% instead of 55%. Don't miss the forest for the trees though.

[1]: http://www.cnbc.com/2017/04/28/google-ceo-sundar-pichais-com...

[2]: http://money.cnn.com/2015/10/14/technology/twitter-omid-kord...

[3]: http://www.marketwatch.com/story/googles-sundar-pichai-is-li...

[4]: https://www.sec.gov/Archives/edgar/data/1288776/000130817913...

[5]: https://www.sec.gov/Archives/edgar/data/1652044/000130817916...