It's almost like people don't understand economics.
Yes, in absolute cost, it is more expensive in Europe and Australia. However, in Europe and Australia, retailers are legally obligated to include taxes in their advertised price. In the US, prices are typically listed without tax, so that's misleading to begin with.
Then there's the factors that the US has a lower minimum wage than Europe and Australia, and also that the taxes paid in those continents tend to pay for a better standard of living, while if you live in the US and have a working-class job, you don't tend to get decent health care and all the other benefits of paying higher taxes. Paying slightly more for a luxury item like a console is a pretty trivial price to pay for living in a more equitable society.