Why is money worth so little in Zimbabwe?

Africa Daily - A podcast by BBC World Service

How many bills do you need to buy a loaf of bread? The dollar isn’t taking Zimbabweans as far as it used to: life is getting more and more expensive. The central bank has introduced a new bill worth 50 Zimbabwean dollars, the highest banknote going around. But this alone has brought back bad memories: could the days of hyperinflation (and bills with far too many zeroes) be back?Host: Alan Kasujja (@Kasujja on Twitter) Guest: Ranga Mberi, Zimbabwean journalist. #AfricaDaily