every currency stayed down long after the GFC hit except for AUD (thanks RBA being oblivous to a currency war) - Chinas resources suddenly became very expensive which upset the demand equation
China growth slowed
We slowed
The world slowed
We have the ability to have a lot more control than people think
If you cant tell already, I blame a sycophantic RBA and treasury trying to model a carbon tax for the dear leaders and dropping rates at the time would have scuppered the idealistic path they were pushing us on.