The Office: Complain to Gervais. How do you think America got the rights to do it? (Oh, and there's a FRENCH, GERMAN, and even BRAZILIAN version of the show, so let's not just focus on America because ours was successful.)
Whose Line: Yeah, and weren't the best two players on that show (the two most commonly called on to do anything) CANADIAN? And all of the best guest stars were Canadian or American.... so, maybe they decided it would be better to just move it across the pond, where most of the talent LIVED?
See, a lot of the stuff you blame on "Americans" is actually perpetrated by CANADIANS, who live and talk like us "stupid Americans." Which ones? If you don't know, how could I--one of those culturally shut-off American blokes--dare to attempt to show you?
Seriously, when people use piddly shit like this to try to say Americans are closed off to other cultures, it's ridiculous. How many different nationalities of people live on YOUR street? For me? SEVEN. And it's a tiny cul de sac.
We don't "steal." We incorporate things from as wide a variety of cultures as possible. In the end, each is less "pure" and "true to its original," but that's how we keep our bank on influences from growing as stale as some other nations (who foolishly believe that the exact same jokes the exact same way over and over is "tradition" instead of "stagnation.")
REGARDING DOCTOR WHO:
It's called localization, folks. One of the things that makes Doctor Who so cool to the BBC's loyal viewers is the, "Hey! I can relate to that!" factor. Also the "Hey! I've been to that place!" factor. People might not realize it all of the time, but it always plays a role in how easily someone relates to a show.
Would you have enjoyed Doctor Who as much if it had originally been set in Japan? Or Russia? Or India? I doubt it. The sets, regional colloquialisms, historical/pop culture references... all of that wouldn't resonate with you quite as well. And it might just be that the plot and acting ALONE aren't quite enough to hook a massive audience on shows like that--there needs to be a relatable "hook" somewhere.
So, maybe the folks behind Doctor Who want to expand the audience a bit. Set up franchises, so to speak. Let them. Let some good American writers try a more America-localized version (not British or Canadian writers TRYING to "write American"), and see if it takes. If it does, that extra money coming in could make ALL of the shows better (which, incidentally, is why America has commercial breaks).