I think Milei was let in to try and drive Argentina away from China and towards the US/Western system

But in general I think massive cuts are more effective than small cuts. Small cuts provide a tiny benefit to everyone while the losers feel them intensely and fight viciously to keep their privilege. Massive cuts (can) provide large enough benefits to the general public to get them involved/passionate, while some of the losers may get enough benefit from the cuts to be net better off (although each would prefer everyone else gets the cuts and he alone keeps his special privilege)