That is just not correct. As someone who has done the budgets for PhD hiring and funding, you are just wildly underestimating the overhead costs, benefits, cost of raising money, etc.
That said, the trade-off is that you're basically hiring consultants since they really work for OpenAI :)
edit: I see we're actually in agreement, sorry, I read the indentation level wrong.
Does that include all overheads such as HR, payroll, etc?