When it comes to Modern Monetary Theory (MMT), I tend to take a rather less aggressive position than some from the classical (Marxian/Marxist) tradition. There are some holes in the theory and its view of the economy is irksome, but others have debated these to their fullest extent (a debate that is at least 100 years old). And, in the end of the day, arguing over the degree to which a theory is wrong is not very interesting. Anwar Shaikh does a very good job of putting the limits to MMT's ideas. Basically, there is a limit to MMT and the question is: what then?