This is such a good example of a straight forward question that achieves the exact opposite of its purpose. What do we want? Highly ethical people that are mission focused and willing to give up on economic upside for the mission. What are we going to get? Sociopaths who are perfectly happy lying to your face about their intentions, or sycophants who are going to tell you what you want to hear.

Do you know who has the best answer to a moral quandry they've had to navigate during their career? Liars! That's a really difficult question to answer if you're honest, it's a really easy question to answer if you're dishonest.

If you really want to pursue this strategy rather than setting up bullshit interview questions you could do something much more straight forward. Agree some standard of living that's acceptable for your employees - let's say 250k in the bay area. Give them that as cash comp, and everything else goes into a "fund" which gets paid out when specific milestones are achieved, as judged by some panel. Cure cancer? You all get 10% of your deferred comp.

If you want your employees to be prioritizing things other than stock price you can literally just encode that into your compensation strategy if you like!

Obviously no one would do that, because they don't actually want to give up the comp.