Paul Krugman on the Republican Party's incompetence

In his New York Times Opinion piece, The Boehner Bunglers, Paul Krugman discusses the extremism of the Republican Party and their responsibility for the government shutdown.  It's mainly pretty common observations, though I like the way some of them are strung together -- mainly, I'm posting about this article because Krugman references one of my favorite cognitive biases:

Conservative leaders are indeed ideologically extreme, but they’re also deeply incompetent. So much so, in fact, that the Dunning-Kruger effect — the truly incompetent can’t even recognize their own incompetence — reigns supreme.

To see what I’m talking about, consider the report in Sunday’s Times about the origins of the current crisis. Early this year, it turns out, some of the usual suspects — the Koch brothers, the political arm of the Heritage Foundation and others — plotted strategy in the wake of Republican electoral defeat. Did they talk about rethinking ideas that voters had soundly rejected? No, they talked extortion, insisting that the threat of a shutdown would induce President Obama to abandon health reform.

For some reason, Krugman links to a Psychology Today article about the Dunning-Kruger Effect, rather than the Wikipedia page, linked here.  Maybe the NYT are one of those pretentious organizations that thinks Wikipedia is an inherently undignified and inadequate source of casual information.