[reedf1]

Being a CEO is already the ultimate answer to the question "Do you care about money or morals". There is a reason that psychopaths are massively overrepresented as CEOs.

My answer would be to check their technical background to see how they ended up as CEO. Was it circumstance, or raw machiavellian ambition?

If you must ask one question I would probably ask, "Do you hate being a CEO?". If they answer "Yes" it likely means they are doing it out of responsibility rather than pathalogical persuit of the unattainable.