While this is certainly true - Tipping is a real hot button for many Australians and it's hard to avoid anecdotes from Oz or not.
1. I am an Uber driver and I once picked up an American girl that worked as a waitress in one of the high end restaurants around Potts Point in Sydney. I said to her it must be difficult not to get tips from the clientele. She said she easily earned $400-$500 in tips per week. That really surprised me.
That's not terribly surprising. By the logic I've seen most commonly about tipping in Australia, most people tip on a discretionary basis where they deem the service to be good. "High end" restaurants tend to charge a lot, and that I assume pays for enough staff to provide a high standard of service (most likely with a lower table:waiter ratio than cheap and nasty diners and cafes). Also people are more likely to enjoy the food, which again is one of the factors people indicate decides whether they tip or not. Ergo ... waiters at high end restaurants get tipped well.
.....What if I get really good service at a department store, should I have to tip that person too?
Anyways, I sent the sales person/staff 3 dozen Krispy Kreme donuts as a thank you. I wouldnt tip them but Im OK with extending an extra thank you for recognition of their work if warranted. Sometimes its a email to management, complimenting the staff and why.