This is valuable, but there's a giant caveat, in that if you were to do the study on the EU level, it would be much the same. Sweden is 10 million people, argu

This is valuable, but there's a giant caveat, in that if you were to do the study on the EU level, it would be much the same. Sweden is 10 million people, arguably more egalitarian, but moving from <25% to >75% in Sweden is not nearly the same thing as going from the <25% of EU (say, most of the population of Romania) to >75% of EU. Swedes at the 25% mark are probably in the 75% percentile for Romania already. Obviously there is more to it, but it's a tricky comparison.