Why hire so many people? How much value could a 10,000th hire add to a company? Google won't tank, but it may have to lay off a lot of people. It stands to r

Why hire so many people? How much value could a 10,000th hire add to a company? Google won't tank, but it may have to lay off a lot of people. It stands to reason that may contradict their "don't be evil" philosophy.