I suspect that adding code to the wiki for calculating who's "most responsible" for a good article, so that articles can be voted on for karma (or anything else of this nature that's been suggested) is really tricky. This practically ensures it would never get done, especially since it first requires the account synchronization, which is nontrivial in itself (but worth doing in any case).
I think that the same can be done manually, either by having an actual vote for "Wiki Editor of the Month" or just by announcing completed wiki tasks in a monthly thread and waiting patiently to receive lots of karma votes. Or both, or another similar idea.
How can we incentivize more productive activity on the LW wiki? There are many articles that could be created or expanded.
Are there previous discussions on this?
One suggestion: We could add a "good explanation!" button at the bottom of each article, and every time it is clicked, the user account responsible for the plurality of words in the current draft of the article gets 10 karma points. This requires that LW and LW-wiki accounts be synced, first.
How can this suggestion be improved?
What other suggestions do people have?