Ferraris and luxuries are more from the 90s, not before, and they are still a very tiny minority. Again, not because there are not people who could afford it. Social concience or whatever you like to call it.
You don't seem to know much about Argentine society. Have you never been down Liberator? It's full of luxury car dealerships from Retiro to Belgrano.
Your studies of "Argentina's rich" didn't teach you to open your eyes?