"Yet it seems to me that there is something different about the current state of economic discussion. Political parties have often coalesced around dubious economic ideas — remember the Laffer curve? — but I can’t think of a time when a party’s economic doctrine has been so completely divorced from reality. And I’m also struck by the extent to which Republican-leaning economists — who have to know better — have been willing to lend their credibility to the party’s official delusions.
Partly, no doubt, this reflects the party’s broader slide into its own insular intellectual universe. Large segments of the G.O.P. reject climate science and even the theory of evolution, so why expect evidence to matter for the party’s economic views?"