Nothing is proven yet as to how he will perform. He's been in office less than a day. Do you just believe Telegraph's headlines? Do you know how to recognize a hit piece? Did you even read the article? I had to dig through the html to read it because of the paywall. What did he do exactly? There's no specific mention.

Yet, since his victory three weeks ago, the self-described “anarcho-capitalist” has begun backpedalling on some of his more contentious policies.He has moderated his tone, filled his first Cabinet with mainstream conservatives rather than ideological libertarian allies, and put more radical ideas like dollarisation onto the back burner.He has also backtracked on plans to scrap the nation’s health ministry.Mr Milei used his maiden speech to warn that he had no alternative to a sharp, painful fiscal shock to fix the country’s worst economic crisis in decades, with inflation heading towards 200 per cent.“The outgoing government has left us with hyperinflation and it’s our maximum priority to do everything possible to avoid such a catastrophe, which would leave poverty above 90 per cent and destitution above 50 per cent,” he said.“For that reason, there’s no alternative to austerity.”

Sounds like the outgoing admin is trying to sabotage him, they want economic collapse to fall on his head and he's giving their national economy a dose of bitter medicine.

Re: Milei, he is a professional economist with pretty much the most extreme contrarian views opposing the Keynesian school of thought, which is the belief that government should control the economy with monetary policy, setting stable prices and taxation. Milei is an anarcho-capitalist who follows the Austrian school of economics which is the side that says government has no special powers over money and cannot ever have complete awareness of all needs therefore cannot accurately determine prices. If you want to find out what intelligent like minded economists think about Milei, here is a good podcast: https://youtu.be/e38bjCBFuAw

So I think he has a very similar reason to visit WEF and tell them what's what.