Talking back to stupidity

NYT columnist Paul Krugman had his chance with this reader comment:

You're an idiot. Give me one example in all of history of a country that spent its way out of a depressed economy.

Krugman's response:

Ahem. There's this country -- people may not have heard of it -- called the United States of America:

The blue line is total debt, public plus private, in billions of dollars; the red line debt as a percentage of GDP (both on left scale).

I couldn't help but be reminded of the classic Marshall McLuban scene in "Annie Hall." I know it's dated, but in a weird way it summarizes the current know-it-all society.