The paper as I read it is merely a description of Krugman's analytical contributions to understanding the observed patterns of trade and are does not discuss any policy prescriptions. I simply see nothing "Marxist" in the article.
(shrug)
Furthermore, I have long been familiar with Krugman's brilliance at creating simple mathematical models to explain complex economic behavior, which is what he is really famous for.
The Marxist view of his Times writings is dumb, and he discredits himself by writing that trash, but he is a brilliant economic analyst.