Wow, not that serious. Obviously - it's fictional.
What "aim" are you referring to? It's spoken word, as you mentioned: fictional. It is not a serious serious proposal for anything. Plus, you have to take into consideration that this was interpreted by another person, Gus Van Sant. If you're referring to the mail-order quality, that could be Van Sant. Who knows?
I believe the only aim in writing/creating this is to make people laugh. He may even be remotely serious about this. Who knows? Who cares?
And obviously, I don't think it's a "branch of philosophy". Did you even watch it? I just thought it would be helpful for the clumsy ones here.
(<sarcasm>Yes, I can appreciate literature/films without taking it literally.
</sarcasm)