I don't see any piece of music being important in a comedy series, people watch for the laughs not the wonderful music stylings ... its like changing Barber Shops because they no longer have your favourite magazine to read.
Really works? 12 writers - 1 Music Supervisor. I can get that from the credits! I honestly doubt that writers, producers and directors, spend their work time thinking about music - so ... that leaves very little resources working on this CRUCIAL part.
What percentage of each episode is made of music? It would have to be some bad movie, if the only redeeming quality was music, the emotion should come from characters (acting+writing) and maybe direction.
How many writers does it take for a show like this? 12? How many actors are on it? About 6? How many crew members? 200? How many of those people have the job of selecting music? 1! Music isn't crucial to any show ... except a musical ofcourse! Most (normal) people tune into a show for good...