To me it seems like there's a lot of junk in SO's unanswered questions tab.  A couple times I've tried to go through and clear a few out by answering or upvoting, but the signal-to-noise ratio is pretty low.  Even if I was >3k, would enough other people come along to vote to close something before my close vote expired?

I think some heavy culling would help answerable unanswered questions stand out and make the whole thing more useful.  But before I start spouting off about how to fix it I'm wondering whether the powers that be consider 180k unanswered questions a problem worth addressing or how they envision the current system clearing out that backlog?