Because they don't meet the koalifications!
Nice to meet you. Wanna make a baby?
Two friends meet together and one asks: What would you do if you won the lottery? -I would build a brothel! Oh, and if it went wrong and you loose money? -I'd open it to the public
Koala farts
Only one, given that he's koali-fied for the job.
He didn't have enough koalifications!