Your theory and the theory you are replying to are indistinguishable for an outside observer: big player with hiring power and hubris compete for employees; in

Your theory and the theory you are replying to are indistinguishable for an outside observer: big player with hiring power and hubris compete for employees; in one case it is companies and in the other it is managers. Even if I admit yours sounds more likely (companies choosing to spend more of their own money vs managers choosing to waste the company's money)