Keep in mind that the people who make a lot more than that are highly motivated not to share. I know for example that the Netflix salaries on Glassdoor are definetely too low, since I know a broad range of salaries there.

Those salaries on Glassdoor pretty much match what I'm saying, with salaries running up to $165 for senior devs. Add 30% for bonus and $100-150K in stock and you're into the $300K+ range I'm describing.

The $600K+ figure is for director level and above.

The $2M/year individual contributor was an outlier.

For Google at least, those numbers are pretty much spot on.

Source - I'm a mid-level engineer at Google and my total comp is within the stated range.

Google and Facebook don't let it be easily known who their highest paid employees are, or even that they exist. They'd get poached.