Okay, this one I read
I said I wasn't going to read any of the Buckley articles, but this one explains why Buckley talked the way he did.
Footnote: I think there's an important part of the explanation missing here -- some of it was affected. The alternative was that Buckley's highly peculiar speaking style was genuine, natural, organic. That's just too weird to contemplate. And think about this little story. In the pages of NR, Buckley used to answer questions from readers. One kind woman wrote in and said, basically, "Why do you use the word 'got' all the time, when it's so obviously unnecessary?" She gave an example something like the following: "Viacom's other co-president, Leslie Moonves, has got to have done
something truly humiliating, because his bonus was only $14 million." (That's an actual Buckley sentence, by the way.) She noted that the sentence would work just as well--better, in fact--without the "got." Given a choice, though, Buckley ALWAYS used "got" in those circumstances. The woman wanted to know why.
Buckley didn't have a good answer, so he offered some brief disquisition on something or other, memorable only for its use couple of "gots" that he knew would annoy the letter-writer. Readers were supposed to have a good chuckle at how above-it-all WFB was, answerable to no one on questions of language. But the honest answer, as far as I can tell, is that it was just an affectation, one designed to create an impression of urbanity and erudition, like many of Buckley's other linguistic idiosyncrasies.