You're misunderstanding the point, a CEO's control of the company is contingent on the boards approval. Yes, of course you can hold the standard for yourself, but you serve at the pleasure of the board and investors. The system selects for amorality because the incentive is profit. I agree with your statement in general, but even if 95% of people live by that rule, there still is systematic pressure to select CEOs out of the other 5%, because then 401k go up (including yours and mine).