Where did you get the $311B number? Because I get a net profit of $59.25B which is only 40k per employee. This assumes that the company doesn't need to keep any profit for future usage which may or may not be case depending on how big their war chest is. Not to say that 40k couldn't be life changing for many of the Amazon employee but the 311B number seems to be pulled out of thin air.
That's $200k an employee, on top of what their regular salary is.
McDonalds made $15B and employ 150k people, that's $100k per employee.
So no, not negligible in the slightest.