Argentina’s problems were common among emerging market economies in the 1980s and early 1990s. However, most of these countries have since made dramatic improvements in their policy-making.
Fiscal policy was tightened, central banks were made independent with bans on financing government deficits, exchange rates were floated and domestic financial markets were deepened.
OK, it’s possible to argue about improve or not there. But essentially that statement is that developing countries stopped using MMT and so their economies improved. Which is interesting, no?