I think why this pisses so many people off, my self included, is the fact that this is the man is the head of an agency that makes certain aspects of 21st Century life Hell for people, not just Argies, but foreigners/expats/tourists too. The arguments put forward are always that it's done "in the interest of the nation" or to "protect and promote Argentine business/industry" or "keep/grow jobs here at home". While I do believe it does some (not much) of these things, in reality it's done to prevent capital flight and it also really helps to promote inflation that's getting less controllable every year.
Long story short, him buying his daughter a car for her 18th Birthday isn't the issue, it's the fact families can't afford a single 20 year old domestic model to get groceries with, let alone a 2013 Audi import.
It's like saying "Let them buy BMWs". I'm sure he doesn't feel bad/wrong because in Argentina the idea of nepotism/getting rich off the public tit doesn't translate and personal responsibility/leadership/setting an example is as existent as the HSR between BsAs and Rosario.