Paul Krugman wants us to believe that he first looks at the situation, and then tries to determine what theory would apply to it (or make up a new theory). He, dear reader, never comes into a situation with preconceived notions, unlike someone like, say, Tyler Cowen.
Yes, this someone who believes that a babysitting co-op in Washington provides the appropriate "model" for an entire complex economy. The co-op printed more coupons (money) and that allegedly fixed everything (although it didn't), so if the Fed prints more "coupons," then our economy will recover.
Yes, the perfect model. Krugman condemns in others what he does himself.