The Australian constitutional convention to establish the Federation in 1901 closely followed the US model that had been established in 1776. We should be grateful for the wisdom and foresight of both. A Federation of States has the advantage of internal constrained competition.
In both the US and Australia, interstate migration is increasing. Victoria is well on the way to self destruction due to decades of Labor government. Whether it’s deliberate or accidental can be discussed. Both are plausible. The end result is the same. Migration out of states like Victoria in Australia and California in the US after leftist government naivety, wilful stupidity or deliberate destruction is on the rise. That couldn’t happen in a one jurisdictional state, such as Austria, for example. The Austrian Government is trying to impose a lockdown on the unvaccinated citizens. Memories appear to be short in Austria. Not even long enough to remember what happened in 1939.
While certain Australian States are doomed, the country is not necessarily so. NSW looks to be a beacon.