TIL. Those numbers are definitively higher than I would expect. Here in Norway the average for someone with a technical or scientific degree and 5-9 years of experience in private sector is 690 000 NOK [1], or about 80 000 USD. The 90th percentile for 10 years experience is 915 000 NOK or 107 000 USD. So for me the idea of making another 100 000 USD more at another company is quite foreign.
[1] https://www.tekna.no/en/salary-and-negotiations/salary-stati...
Those numbers are accurate for the U.S.
Possibly even a little low for the Facebook / Netflix / etc tier.
Throw in stock growth for companies like Google back in the day and FB more recently. FB stock has doubled in ~2 years increasing the liquid value of employee stock compensation by nearly the same amount.
While that's true, I could invest my own funds in Google or Facebook stock and reap similar growth (depending on my access to funds to invest).
Also, some companies will have target compensation bands (I know Yahoo did) where an increase in stock price will actually result in a smaller additional grant each year.
And while $300k assumes fairly high performance at a top public company, it's certainly not the upper bound.