Both models below appear to be in play IN THE US>Oz will be one...

Both models below appear to be in play IN THE US>Oz will be one of several safehavens that go nuts before the depression. IS MY GUESS as global funds try to find that safe currency/government/hole in the ground.

http://en.wikipedia.org/wiki/Hyperinflation
In the monetary model, hyperinflation is a positive feedback cycle of rapid monetary expansion. It has the same cause as all other inflation: money-issuing bodies, central or otherwise, produce currency to pay spiralling costs, often from lax fiscal policy, or the mounting costs of warfare.
In the confidence model, some event, or series of events, such as defeats in battle, or a run on stocks of the specie which back a currency, removes the belief that the authority issuing the money will remain solvent — whether a bank or a government.