There's an old stock market scam. You open 100 accounts. You invest randomly. After a week, roughly half will be turning a profit. You close the ones that aren't, and do another round of random investing. Again, roughly half make a loss, half a profit. After a few rounds of this, you have lost quite a lot of money, but you have one account that looks really stellar - huge returns on investment. You then open this up to investment, with the disclaimer that past performance does not guarantee future results, and wait for the money to roll in (you can then invest this in your own companies, or just take it and run away).
Much the same applies with CEOs. You take a few thousand business graduates each year and put them in management positions. They all make random decisions. Then you cherry pick the handful that have made decisions that turned out well. Then you say 'Superstar CEO, please pay enormous salary'.