As is well known, there are MANY of us who have that opinion of that particular cretin's work virtually every time he writes something. We use much more descriptive words than "lacking merit", too.
The best part of this linked post comes in the comments, from Greg Ransom, who says:
"Why do you take it for granted that Krugman is making any sort of genuine argument here.Precisely.
This is politics.
It meets the standards of politics.
Krugman doesn't do economics in his column."