But the problem with many of these systems is they might be too democratic. Discourse, by the same creators as SO, also breaks from the very same problem - someone who is not part of the community suddenly becomes the community despot. The structure sounds similar to what you propose; anyone who makes contributions can govern.
I think you have to think through how scoring is done and managed. There are systems that work, like the Nobel Prize and Academy Awards, but those only work to recognize top people, not large groups of people.