@noxibox has a point though. Currently our inflation is being driven by food and energy prices and both commodities are necessary for survival.
It doesn't matter if you make the prime interest rate 30%, people still need to eat and get to work.
It doesn't matter if fuel ends up costing R50/litre - I'll still use two tanks of fuel to get to work. If the price of bread triples I'll still buy the same number of loaves to eat in a month.
That's what I don't get. If people have already cut out all the luxury spending then it doesn't matter what you do with the interest rates unless you expect people to stop eating entirely.