I don't know enough about anything to intellectually comment on this kind of thing, but I do agree that the standard of living for the poorest is probably a good metric of a society.
If the poorest people in a country get to live a happy, healthy life with people that love in not be stressed about food or housing, that sounds like a fantastic world.
Do any countries current achieve this? Japan maybe? I have no clue.
These days, I believe every country is struggling with housing in some regard. But a good part of the EU and Japan and maybe South Korea might have had all those in the 2010's
It's hard to compare countries. Japan has a culture of lots of construction, and that housing is not an investment. They also have far less zoning rules and far less housing requirements (less of "must have 2 parking spaces, must have N meters of space in front of lot, must have X size bathroom", etc. The result is there are plenty of inexpensive and small places to rent. For example, I just did a search on suumo.jp on one train line 1 or 2 stops from Shibuya. 36 units came up under $275 a month. (would be several hundred units if I search all lines that go through Shibuya). The units are small (7.5 to 15 square meters), Many don't even have a shower (you'd walk to a public bath). But, you'll have shelter. So even on a minimum wage part time salary you can probably afford to have a roof over your head. And, that was in Shibuya. Go out 10-15 stops and it will get even cheaper or they'll get larger with more amenities for the same price.
If the poorest people in a country get to live a happy, healthy life with people that love in not be stressed about food or housing, that sounds like a fantastic world.
Do any countries current achieve this? Japan maybe? I have no clue.