The 10k queue currently has and always has a large number of close question flags from people who don't yet have the vote-to-close privilege (3000 rep) that never get checked.
A while ago waffles asked the question 26,000 questions have close votes, now what?, and so here's what I think should now happen;
A flag-to-close from a <3000 rep user should lower the threshold of votes needed from >3000rep users to close the question. Without having data that's easily to manipulate, I'm not sure exactly how much this should lower the threshold, but I'm thinking something along the lines of 2 flags = 1 close vote.
I still think it's important that the close procedure still gets the attention of >3000 rep users, so I propose a limit on the number of close-vote-spaces that can be filled by <3000 rep users; e.g. flags-to-close can occupy 3 vote spaces, but 2 votes must come from >3000 rep users.