I have not discussed with either Westminster or Canberra how they manage their business. I'm a bit familiar with some of the culture.
I would suggest to you that Westminster with its 650 members and a thousand years of history may be bound by certain traditions and behaviours that are expected and that are different from our own.
Australia has a somewhat newer Parliament. Even though it has a close history to Canada's in its development, it is a highly partisan chamber, where party discipline is very strongly enforced. I would see that its behaviour is probably closer to what you have just mentioned.