I lived for 20 years there. In my opinion the root of all problems there is that it is embedded in the culture to be as egoist as possible and to steal as much as you can from everyone else in the most ruthless and shameless possible way.
People usually complain about the government being corrupt and stealing to the people. But most people are the same, at their own level. They will try to steal as much as they can at their level or what is close to their hands. From bit paying taxes to actually pocketing others money, etc.
I know it is not everyone, but it is the majority of the people that are like this, politician or not.
I still have a friend there, always complaining public services don't work (healthcare, police, etc) but then in the same conversation he says with a straight face that he prefers not to pay with credit cards or bank accounts because then he'd have to pay taxes and declare the money.
There are people like this all over the world, but the proportion in Argentina is huge, a big majority I'd say. It's part of the culture.