It's been mentioned before about the 30 minute sitcom containing padding. And only recently I've been reading The Vicar Of Dibley and the amount of padding with Alice is ridiculous. I quite like the show whenever I've seen it, but for writers to get the story in very early and stretch it to 30 mins will, to my mind, always require padding.
I see it all the time in Only Fools And Horses too. Whereas the American comedies, with their 22 mins, would be away and onto something else, we're hanging on so we can get up to 30 mins. What's the solution? Three, four plots an episode? Start the conflict later? Put the padding in at the start?