Whither the critique of political economy in post-Marxism?

In my dissertation, I made an argument that the decisionism of Badiou, Zizek, Laclau and other so-called 'post-Marxist' theorists is derived from an intra-theoretical debate amongst left-Heideggerians, specifically against the pervasive authenticity politics and existentialist politics of the time. I argue that Lacan's 'ontology of lack' was the alternative formula that enabled these thinkers to …