Swedes in the US are wealthier though, and maybe not for reasons related to national economic systems, like the dollars status in international trade. A fairer comparison might be Scandinavia vs the UK, they're both European contrives with similar demographics. The difference in economic systems between the UK and Scandinavia, and the US and Scandinavia, is smaller, but the quality of life in the UK is still appreciably lower than in Scandinavia.
Are Swedes in Sweden happier than descendents of Swedes in the US? I will wager that US descendents of Swedish immigrants are happier that Swedes.
Swedes in the US are wealthier though, and maybe not for reasons related to national economic systems, like the dollars status in international trade. A fairer comparison might be Scandinavia vs the UK, they're both European contrives with similar demographics. The difference in economic systems between the UK and Scandinavia, and the US and Scandinavia, is smaller, but the quality of life in the UK is still appreciably lower than in Scandinavia.