It's pretty common in professional services contexts for people to be charged out at least 3 or 4 times their salary.
> The World Health Organization, a United Nations agency, helped broker the deal. Under it, Brazil pays Cuba... nearly four times what Cuban doctors earn through the arrangement.
Google makes $1,200,000 per employee; a comparable average salary is then $300,000, which sounds on the high end of plausible if restricted only to engineer salaries (and it'd be a very top-heavy average), but implausibly high for a company-wide average.