I think it would be better if more close-votes would be needed to close a question; at least the way it is right now.
The problem is that a once-closed question is very unlikely to be reopened because not much people will see it anymore and the other people will not check back. If the author knows how to improve the question, it doesn't make sense anymore to edit the question because not much people will see that anymore. The current only real solution is to just repost the question; however, that is not a really nice solution.
I made a few other proposals which maybe would make this request obsolete to need more close-votes:
However, without them, I really think more close-votes should be needed. If the question is really bad, it would also not need much time to get 10 close votes or so together.