The RBA lifted rates to 9% at the beginning of 2008.
Then dropped them like a rock when the stock market literally collapsed. Hardly anything to do with government stimulus as that didn't occur until after the collapse of the stock markets around the world and the iminent threat of a total bank collapse (even here in Australia) which was only averted in Australia because of the government guarantee and the bailout of the too big to fail banks in the US.
Hence the increase in Interest Rates in early 2008 had nothing to do with the stimulus during FY 2008/2009.
