A good question will receive many answers, and much more views than normal.
This level of activity is not reflected in the upvoting of said question. I recently encountered several such questions, which until I pointed this in the comments (like in this example on SO) stayed in the lower 0-2 upvotes.
My two suggestions:
- Automatically upvote any question you answer, with the ability to cancel this up-vote. This makes sense to me, as I answer only questions I like/are good (and I suppose others too).
- Display popup message similar to:
Have you considered upvoting this question?
Addressing comments given so far: Answers do not mean a question is good, but it does imply you have an opinion on it. So why not prompt any one who answers to express their opinion by voting? (Similar to what happens when you upvote an answer to your own question).