Have you ever been around senior management of a larger company? Everyone I have met works at least 10 hours a day, and often more. Except for vacation days perhaps, but even then they are still tied to the laptop and phone.
If the CEO wants to work him/herself into an early grave, that's his/her choice. But to force employees who, let's face it, aren't going to be able to enjoy the fruits of their labor like the CEO will, to give up large portions of their personal time to improve the wrong metric? That's unreasonable.