With the difficulties Australia has been facing over the past 20 years, and will face for the next several generations, there is absolutely no way I would be relocating my family to Australia.
I understand Ireland is not doing so well at the moment so maybe a case of "greener pastures"?
If in doubt check out the true economic data provided by true independent analysts (with the exclusion of the Australian government), the true economic forcasts that are currently being made available.
Don't rely on fictitious data (spin) purposely generated by the Australian government propaganda machines.
If you do chose to live here be prepared to be forced to pay taxes on taxes on taxes, ....and then more. If you have a family, home mortgage, a motor car etc be prepared to pay realistically approximately 95% of your gross income in tax to local, state and federal governments.
Just my two cents (plus GST) worth.