The higher people think the real inflation rate is, the more likely they are to use the card to benefit from it; more card use means more consumption; more consumption means more inflation... it becomes a self-fulfilling prophecy.
I don't buy that at all.
While it's true that consumption and inflation are related, I don't think there is that much of a relation to credit cards. 12 cuotes sin interes etc is promotional pricing. Just like the 20% of with club la nacion