I spent a fair amount of time in Australia a few years ago.
Most of the time was with friends who had immigrated their in the 1960’s when only people of European heritage were encouraged to immigrate.
Essentially, what happened is the country was run by the party of country people, and the powerful politicians were those with large farms/ranches/stations who made their wealth from agriculture.
After the 1970’s the labor party was able to guilt trip the country party into allowing vast numbers of non-European heritage people to immigrate to the cities. By the middle of the 1980’s, the votes had shifted to the cities. The Left became the dominant power, and the governance of Australia went downhill fast.
My experience is Australian prices are about 1.5-3 times prices in America (a few years ago), and they tend to follow the trajectory of England. Very sad.
Australia ranks ahead of the United States in:
OECD Better Life Index
https://www.oecd.org/en/data/tools/oecd-better-life-index.html
Legatum Prosperity Index
https://index.prosperity.com/rankings
Freedom House Index
https://freedomhouse.org/country/australia
https://freedomhouse.org/country/united-states
Heritage Foundation Economic Freedom Index
https://www.heritage.org/index/pages/country-pages/australia
https://www.heritage.org/index/pages/country-pages/united-states
However, none of these measures includes your important variable of how white is the population. Australia is becoming, like the U.S. and Canada, a country with a large Asian minority; and those Asians are as good or better than we Europeans in a lot of ways. They have intact families, raise their children well, obey the law, and they have strong work and save ethics.
Take a look at the 2024 U.S. Math team - the world champion math team.
https://maa.org/news/usa-first-at-imo/