Interlocking boards of directors are a major source of this problem. The group-think is that they have to pay ‘X’ to ‘attract’ a CEO with the skills to manage their company. In reality it’s more like NFL owners throwing money at college QB’s in the hopes of getting the next Tom Brady. All they succeed in doing is bidding up the price of mediocre QB’s for everybody and the league suffers.
Yes, and education. All of our CEOs, judges, and journalists pass through a small number of elite schools.
That process makes sure they conform to the same liberal worldview.