"They Won't Know The Difference"

The lesson I took from this observation was that we (Krugman, I, and economic commentators in general) had a responsibility to explain not just what economists believe, but why we believe it — to help readers understand that there’s a rigorous underlying logic to the discipline, and that there are good reasons for insisting that people adhere to that logic. Nowadays, when he’s at his most obstreperous, I sometimes suspect Krugman of having drawn a very different lesson — that because nobody understands the real logic of economics, we can get away with saying any damned thing we want to. It’s a frustrating thing to watch, because when he’s good, he’s very very good. But when he is bad he is horrid. I won’t list examples here, but you can find quite a few by browsing my Paul Krugman archive.
http://www.thebigquestions.com/2012/05/16/when-the-saints-go-marching-in/