on the same lines as scamp…I believe that the idea of the site is getting answers. I rarely deem a question as “great” unless it really makes me think or it cannot be answered with a Google Search. If someone gives a great answer, i’m more likely to award that person because it helps their credibility. If you see a person with a higher score, would you not generally assume that they know what they are talking about? Sure, everyone has to start out with a low score, so you can’t discount those answers, but I’m just speaking generally.
So, if a person were to receive all of their points through “great questions”, would you trust their answers as much? You won’t know where they got their points, but just imagine that you could.