I'm not much of a fan of Krugman's blogging (which is fairly partisan), but it's pretty inaccurate to summarize his academic work as "built around big government manipulating the money supply". Yes, he's some variety of neo-Keynesian, but so are conservatives like Gregory Mankiw; Krugman's a vaguely center-left one, solidly in the mainstream (and considerably to the "right" of the modern-monetary-theory group). By "partisan" do you just mean that, like most economists, he isn't a follower of Austrian economics?
That's precisely what I meant by "built around big government manipulating the money supply"
As for partisan: I think all economists that take a definite position fall under what I meant by "partisan." I meant: advocating a niche view that is not accepted by a majority of experts. (In economics, I don't think there is currently any view that doesn't fall under this description.) That's not to say there isn't a correct view; I think there is.
This just couldn't me more false. Krugman's whole career is built around big government manipulating the money supply.
and he knows his economics
Lots of people who also "know their economics" disagree with Krugman. Economics, as a field, hasn't risen to the level of a science yet.