I won’t refute this entirely because it is HIGHLY flawed and the author clearly lacks an understanding of MMT. To begin with MMTers are technically Minskians based on Abba Lerner’s beliefs.
As for the nonsense above, with regards to #3 - the bond market exists solely as a monetary tool that drains exess reserves and helps the Fed hits its overnight rate. It funds nothing. There is demand for bonds primarily becaue the primarily dealers with which the Fed conducts its business are required to make a market in government bonds.
The other notions have been soundly refuted by Warren Mosler, Cullen Roche and other MMTers.