Actually, there are punchlines. The difference is that, instead of Michael saying or doing stupid yet believable and another character delivering the punchline, Michael delivers the punchline in the form of a statement or action that is too stupid to be believable, much less funny. . . Then promptly follows that with a second punchline that is even more unbelievably stupid, followed by a brief silence and then another statement by Michael that makes it even more painfully obvious that his character is an idiot, etc., etc.
It almost feels the writers think their audience is too stupid to follow a conversation, too stupid to get the joke with just one punchline, so every time Michael delivers a punchline, he hammers it down over and over again. It's like every punchline gets followed up with "Do you get it? Isn't that funny? Huh? Get it? Want me to explain it to you?"
Lets make a comparison. If comedy great Jeff Dunham were a sitcom, traditional sitcom format would be:
Daddy D:
"You the ho!"
Jeff D: "No I'm not."
Daddy D: "What do you do for a living?"
Jeff D: "I entertain people."
Daddy D:
"You the ho!"
Jeff D: "No I'm not a ho."
Daddy D: "Why do you do what you do?"
Jeff D: "Because I like what I do and it's the best way I know to make money."
Daddy D:
"You the ho!"
Jeff D: "Wait, what if I said I did it only because I enjoy it and don't care about the money?"
Daddy D:
"You the dumb ho!"
That same routine in
The Office format would be:
Jeff D: "Hello, I'm a ho. I am a total ho. I am such a great big ho. Can you believe what a total ho I am? Get it? Well, I'm a ho. I'm a big fat no-doubt-about-it ho. Are you laughing yet? Dammit, I can't make it any more obvious to you idiots what a great big fat ho I am! I'm such a ho! Get it?!"
[scene change]
Daddy D: "Hey, you wanna' see a movie after work tonight?"
[scene change]
Jeff D: "Hello, I'm a ho. I'm a total ho . . .[cont.]"
You wouldn't expect an episode of
Family Guy to be funny if only Meg had a speaking role, would you? The foil is only as funny as the characters which s/he contrasts.