In Argentina, inflation is a way of life
Argentinian here, 30 years old, middle-class. Yes, we have a big inflation problem and what the article says is correct, except I don't know anyone who buy tuna or pasta or whatever to store because of inflation. In fact, anyone who would do that wouldn't be smart at all, would be pretty stupid.
A few ways to fight inflation is buying dollars and selling them later: our inflation index goes hand to hand with our USD:ARS, even even below that (intuitevly it may be a problem). So it makes no sense to buy things to store later.
What we do is buy stuff such as electronics in isntallments payments, even if the interest rate is high. Quick example:
If I buy a computer in cash, its price is 100. If I have to pay 12 installments, each installment is 20 (240 in total). However, in one year, due to inflation, 20 may be nothing compared to what i earn (salaries are also raised to try to keep up with inflation), so big payments we usually do that.
But almost no one get groceries in installments, etc (also: your credit card / bank imposes you a limit on installments payment, so it doesn't make sense to waste them in daily things and you try to save it for when you need it, such as electronics or emergencies)