If anyone was wondering what my exact beef with economics is, I just found my final undergrad philosophy paper. (I was lucky and got free rein on question choice, so of course at once I chose to beat up on economics.) It's pretty derivative of Phil Mirowski, Steve Keen and John Emerson, but the framework is new. And from the writing style you can see why my markers often had a problem with me.
Given the word limit, it's just a sketch of a vast topic - and embarrassingly sketchy on the history, sociology and technical economic details (i.e. failing at everything that I accuse PE of) - but most of it strikes me as crudely true and worthy of a careful book in future.