lmao, so I just ran this idea by my girlfriend and she said "yeah its good but there would be trolls, I would just put hideous women with hot guys, and vice versa" - so, not so easy to succeed at (also, what a catch my girl is :P)
Make it based on reputation for the matchmakers as well. So if you purposefully do bad matches, you'll eventually not be able to do any more matchmaking.