i think geographic location, population size and population density have a lot to do with socio-economic differences between finland and the us:
finland: 5.5 million
usa: 327.1 million
finland: 5.5 million
usa: 327.1 million
USA: $60k Finland: $45k
So there's no reason Americans shouldn't have the same level of comfort.
It's not, however, useful as the sole metric for evaluating the economic condition of a society.
for me it's just a fact that in a high population, high wage, highly regulated society it's much harder to overhaul things radically than in a similar tiny nation. without some sort of a disaster (think WW2), it would be very hard to force everyone to switch from an entrenched system to a different one.
how would it be easier to force 300 million people vs 5 million?