Earlier quoted context omitted.
How do you figure? I've been to both Iraq and Oklahoma, and I can tell you the quality of life in Oklahoma is a hell of a lot better than Iraq, pre- or post-war, in spite of their similar GDPs.
Well I've been to Scandinavia and despite the countries having less GDPs, the quality of life, for the average citizen, is way higher.
The Scandinavian model relies on many incompatible tenets that could be mentioned, including but not limited to immigration. The Swedish system is already practically collapsing from its first major influx of immigrants ever.
If we want a country in which everyone is welcome, it can't be a country in which we offer a fantastic quality of life automatically through living there. I mean, not until we have some post-scarcity economy, at least.
Another issue is that maybe part of the States' success is related to having more income to yourself, to spend at your discretion after taxes, rather than it being spent for you by the government. It inspires a lot of immigration from people with big ideas, and that could easily change if the U.S. surpasses other countries in taxes.
I think there are models the U.S. should adopt from Scandinavia, however they're smaller in scope and address efficiency with tax money. One example is that all your income tax goes to the local government up until a certain point (~65,000 USD?), and it's redistributed at that level, rather than being siphoned through so many levels of bureaucracy like in the States. It's funny, while being the polar opposite of the U.S. and its conservative values, Sweden still manages a smaller federal government!