Interesting question.  I dissagree that questions are more important and that there will ever be a situation where we won't have any questions.  The way I look at it is  that, there will always be questions as they are easy to think of and don't require much effort to create. Answers, on the other hand, especially good ones are much harder to produce and thus get rewarded accordingly.

I could be wrong, as I don't have direct insight in their decision making but, I think that is the reason behind it. It's common sense to reward something that requires much more effort  and intellectual capabilities to create.