Yep, Good one. And again more evidence, as we've seen before, that Krugman admits and/or corrects when he believes he gets something wrong.
Apparently he moved from H.L. Mencken in 1995 to Upton Sinclair 2001 .. your -
In conclusion, Upton Sinclair should receive credit for the statement he spoke and wrote in 1934. Currently, the assertion that H. L. Mencken made a similar remark is unsupported. William Jennings Bryan wrote a thematically related comment in 1893. https://quoteinvestigator.com/2017/11/30/salary/
It was Plato who said, “He, O men, is the wisest, who like Socrates, knows that his wisdom is in truth worth nothing”