Austrian School advocate Robin Koerner attacks MMT in an article written for the Huffington Post.
"First of all, the system described by MMT, while real, is obviously utterly unconstitutional. Second, (as the MMTers admit), the supply of money in the private sector remains critically important as inflation is the monster that must not be unleashed (and the Austrians know all about that). Third, everyone other than the government still use fiat money in creating the economic dynamics of the nation in a way that the Austrians best understand. And fourth, and perhaps most importantly, government cannot merely spend money into the private sector without choosing where and how to spend it. And any such choice removes spending power from private citizens and redistributes it just as surely as in the days when the likes of Hayek and von Mises, two of the greatest thinkers in Austrian economics, were doing their best work. Put simply, while MMT offers extraordinary insights into aggregates, no economic decision ever affects only an aggregate".