How can an economy survive with such an inflation? How can you work, knowing that the salary you agreed to at the beginning of the day, is now worth 10 times less
They actively crack down on those using foreign currency, it's actually illegal to use foreign currency for transactions there - although of course everyone does and there is a massive black market for this.
Mugabe also tried to fix the price of common goods - e.g. Bread, Milk, etc.