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Here's an alternative proposal for the stackoverflow.com close queue. Two queues.
Queue #1 shows only questions that are no more than 24 hours old. The site would use this queue to get attention onto the most important area: the front page. Make it a way to gather community attention onto incoming crud.
Queue #2: older stuff. With an important twist: if you want to have humans slog through 80k of crap, try presenting it to them in batches that they can complete. This queue will never have more than 1000 things in it. The system will only dump the next 1000 things into it when we finish dealing with the previous 1000 things.
Net result: reviewers can visit queue #1 and have real impact on the state of the first page. They can visit queue #2, and have enough positive feedback in the form of progress to motivate them to come back.