Not that this was ever brought up, but, amidst bank bailouts and stimulus packages, wouldn't it make sense to have working holiday makers spend more of what they earned within Australia, buying Australian goods and services?
All working holiday makers would generally count as non-residents for tax purposes, paying a whopping 29+ percent on their earnings and feeding a massive income tax stream to the treasury. Many working holidaymakers would eventually qualify as residents though and claim substantial tax refunds. When this happens around or after departure, this money never gets spent in Australia.
But at times of recession when spending contracts at alarming rates, having backpackers better off and spending more may be the smart move.