As an Oz Bargainer I find tipping a product of an employer who OzBargains his employee's.
The fact you will get yelled at for not tipping proves this can be high risk.
After Foreign correspondent showed down in jungle town and the Age ran an Article which show cased awesome comments like this;
"I agree with the concept of "When in Rome etc" and I'm not worried about the cost of tipping. However, I find it confusing and embarrassing. Every time I handed over a fist full of dollars to a porter, door man, cab driver I felt I was saying to them "I'm better/richer than you, so here are a few crumbs from my table!"
Read more: http://www.smh.com.au/travel/australians-are-the-worst-tips-…
I feel it is important to continue this discussion here.
We're fresh back from the Socialist republic of Vietnam. We found the guy on the reception desk fantastic. I tried to slip him a few bucks and he declined saying tipping was frowned on in his country.