On the same $90,000 gross, a worker takes home roughly $118 more per year in Australia than in Canada. That gap reflects the tax structure alone — before rent, healthcare, or savings behaviour come into play.
Housing is the first multiplier. Australia has very high rent pressure, while Canada has very high rent pressure. The two markets behave similarly, so most of the gross-to-net advantage flows straight into disposable income.
Healthcare and pensions go in the opposite direction. Australia runs a universal healthcare model — Medicare gives universal access; private cover speeds up elective care. Canada uses a universal model — Universal provincial healthcare; dental and drugs are typically private or employer-paid. The country with lower take-home often shifts costs that the other country leaves to your private budget.
Net-of-everything, a relocation decision should weigh strong public welfare in Australia against strong public welfare in Canada, plus differences in pension capture, social safety nets, and city-level cost of living.