Mr Mosler defended himself at length
on this thread: https://forum.freecapitalists.org/t/an-austrian-critique-of-mmt/17182/4
and here: https://forum.freecapitalists.org/t/an-austrian-critique-of-mmt/17182/38
and here: https://forum.freecapitalists.org/t/modern-monetary-theory-and-chartalism/15858