This is the third (and final) part of my response to an article published by the German-language service Makroskop (March 20, 2018) – Modern Monetary Theory: Einwände eines wohlwollenden Zweiflers (Modern Monetary Theory – Questions from a Friendly Critic) – and written by Martin Höpner, who is a political scientist associated with the Max-Planck-Institut für Gesellschaftsforschung (Max Planck Institute for Social Research – MPIfG) in Cologne. Today, we will discuss inflation and round up the evaluation of his input to the debate. The overriding conclusion is this. As a researcher, I am instinctively driven to dig deep before I make public comment. It is easy to think you have an idea that is novel and then venture forth with it. One usually finds, fairly quickly, once you start digging into the literature, that the idea is anything but novel. Modern Monetary Theory (MMT) has been around for around 25 years now (give or take) but has really only gained traction in this era of social media (blogs, tweets, YouTube, etc). Many of the issues raised in the Makroskop article have been covered extensively over the last 25 years. Many academic and non-academic articles have been written by us on these issues. Thus, if my response here is not sufficient, then I urge readers to consult the massive literature we have built up for further clarification.