I'm quite lucky in that i have the right to live and work in America, Australia, New Zealand, UK and the EU. I've also thought about this a lot as i near retirement (working in tech in the USA atm, it's been a fun ride but definitely time to think about options).
Australians don't like to acknowledge it, i guess to avoid being flooded since house prices are high, but it's the easiest pick by far. A western nation which rises as China rises due to sheer resource wealth and stable government.
Currently it's already >3x the median wealth per capita of the USA. Slightly lower on average but medians the real way to judge for the typical (non-0.01%) person.
Exports more than it imports.
Government revenues have been far ahead of spending for the past few years. Can you believe that?! A western government not just going into ever increasing government debt!
An extraordinary rollout of solar and batteries (dwarfing China's attempts at solar on a per capita basis) to the point where you can sign up to plans where power is free during peak daylight hours and the government will pay you $3k to install a home battery to store that free power.
Basically no tariffs so you can buy an electric car for USD$15k. Which goes well with the above point.
I look at the USA, UK and EU and people seem to have given up trying to vote in a better government? They don't seem to care about importing more than exporting or government spending exceeding revenue as election issues worth voting on?