Why Can't the NYTimes Fire Paul Krugman for making up stuff

If the Times had any sense of integrity they should can Paul Krugman for making up stuff and spreading falsehoods.

Case in point, Krugman's trashing of SuperFreakanomics.

From Ari Armstrong

[So where do Levitt and Dubner claim that global cooling was the consensus in the 1970s? They don't say that. Krugman just made that up. Talk about grossly misrepresenting other people's research.

Where do Levitt and Dubner imply that Weitzman's paper urges weaker action on global warming? They don't imply that. Krugman just made that up. Because it's "just the basic issue of representing correctly what other people said."]

From Greg Mankiw

[Paul is rebutting claims I did not make, and he is giving Team Obama more credit on this question than it is due.]

Shame on the NYTimes for keeping Paul Krugman.