Theoretically the more works posted a day, the more tag wranglers they'd need. (This is assuming people don't go back and re-tag their works later.) So having tag wranglers is a great solution when they're only getting a hundred new works a day, but if they're having a few thousand* all of a sudden - let's say fest season - they'll need current tag wranglers to work overtime and/or new tag wranglers.

* I am just making this number up; I don't think this number goes higher than a few hundred right now. A few thousand is more FFN's league.