I don't watch Jon Stewart to make me laugh. I enjoy his show because he uses funny as a weapon. Like the kid in Kick-Ass trying to be a superhero. Jon fights injustice with the only weapon he has - his wits and charms. The things he points at are funny (or make me cry) - not the gags so much.
Jon and his writers and fake correspondents are doing what they do best - make jokes - incidentally they also make them at the expense of those who need them most - who need to be put to their place once in a while.