Argentina is divided in Provinces. Each province has some kind of autarchy where they can hire public employees. There are provinces with 60% of public employees and only 40% in the private sector (where some are even whithout registration). Milei cannot fire these employees, and that is why there are governors being in the province for more than 30 years (we call them fiefs).

What Milei can do is do a restructuration of the government by reducing from 24 ministries to only 8. To reduce the deficit in deficitarian entities and institutions. Reducing the deficit in advertising. Change to a private-public model for new infraestructure. Devaluate and destroy the bonds that are at a 120% interest rate and avoid printing more money. Aside from many other things needed.