... lecturing the rest of the world on the best economic approach ... huge variation in ... outcomes. The "big" versus "small" government approach differences appear to have a limited impact on over all economic wealth of a country and other factors appear to be far more influential.
Do you have any specific examples of counties with big, interventionist governments that have produced anything but poverty and misery?
You may want to read Adam Smith, Friedrich Hayek and study economists like Milton Friedman before making such ill-informed, naive and foolish statements. You will discover that when government focuses on the basic principles of laws, public order and national defense (and leaves everything else to the forces of competitive capitalism), there is greater wealth, peace and equality between people. Conversely, when "big" government tries to define winners and losers (employing tactics like printing money), the ones most harmed are the poor and unskilled, leading to social strife.
You are correct that Argentina is highly corrupt. Why do you think that is the case? It is because there are many opportunities for graft and corruption in a "big" government. Milei is warning all of us of the perils of collectivist ideology. As a "spectator on global politics", you should take note of his comments and not dismiss them as lecturing as you have much to learn.