The goal is not necessarily to reduce the overall number of cases although that is often a positive side effect, but rather to spread the cases out over an extended period of time.
On the departure of the hated proctor, a broad grin would spread over the countenance of the joker, and in a little while the scene would be repeated with variations.
And so the dream is that you could take that top 10% and have them help the others to get best practices, the best teaching ideas to spread all over the country.