Maybe to do with a tiny talent pool - we're such a small country we just don't have the funniest or most talented people here that we have been exposed to overseas. Same goes for our sports - although we excel in some things (re: the Olympics this year), we just bomb in many many other things. It's cos we don't have anywhere near the same population as other countries (US, UK, Australia), consequently, we can't afford to put in as much money to train our athletes to the same standards as those countries.

IMO.