The ABS has released their analysis of individual state accounts to Jun 2017.
This includes an estimate of average gross household disposable income per capita. The variations across states are significant and interesting. Of note is the astronomical value, and trajectory of individuals in the ACT, relative to everywhere else. In addition, we see a decline in gross incomes in WA (one reason why mortgage defaults are rising there).
This goes a long way to explaining the high current levels of mortgage stress we observe, because home prices, mortgages and credit growth are all rising faster than income. NSW and VIC, then QLD are worse hit.