That network of insiders colluding behind the scenes are NOT providing optimal results for the shareholders, or for the market in general. They are instead optimizing their own short term gains at the expense of everyone else.
A bunch of good old boys making handshake deals with their buddies aren't actually choosing the best products and services for the best price, and the companies they helm will eventually suffer for it as the entire market does each time it happens.
And the customers' boards and management teams. And the suppliers'. And the regulators' and electeds'.