I am in Sydney at the moment and yes the grocery stores are well stocked but whilst there is plenty of healthy yummy food it is far from cheap the prices are eye watering.
On top of that Utility costs, transport,especially taxis, government charges and don't even contemplate a Thai massage.
To be fair wine is considerably cheaper than Thailand and today I bought a Braun shaver today at a 45 percent discount.
Glad to be going home to Thailand.
PS I don't live on a Aus government pension.