> Unpopular here, but I judge degree of development / maturity of societies on 2 major factors : 1) how it can take care of the vulnerable members in need - mostly heathcare, with som basic social support to help you bridge between jobs, plus obviously (mostly self-earned but managed by state) retirement; and 2) how well it invests into its future via education on all levels. Education aint luxury but empowering basic need. The question then is, how much does given country wants to empower potentially all its citizens.

The test of Rawls' "Veil of Ignorance" is a pretty good way of cutting through the details and getting to what matters: if you had to be reborn as someone in any country (or, had to choose between two, if we wanted to e.g. rank them), and you couldn't control anything about the circumstances (race, social status, money, intelligence level, disabled or not, et c.) but were leaving it up to a die roll based on the demographics of the place—which would you choose? The ones you're more-inclined to choose are the better ones.

https://en.wikipedia.org/wiki/Original_position

And yeah, stuff like ensuring the worst-likely-case for a resident isn't that bad, and that you get a significant helping hand to improve your lot, helps a ton to make a country more appealing, in this sort of thought experiment. Far, far more than e.g. making sure the few very-best-off really run away with the prize (which improves the appeal of such a place basically not at all).