Definitely not standard practice in Australia.
In the US, waitstaff etc. wouldn't be able to survive without tips. They can be paid as little as they are because tipping is expected, and tipping is expected because of the low pay.
I never tip. If I had amazing service then I'd consider it, although generally tips are pooled anyway. I think I'd be more inclined to speak to the manager and tell them how great the server was.