US and ScandinaviaNotice that I mentioned cultural diversity. There is a reason that Scandanavia can manage with a more socialistic government. The gene/meme pool is far less diverse and evolutionarily created reinforcement of good communal practices are already present. A thousand years ago and beyond, if you didn't grok cooperation and thoughtful planning, you starved and died come winter.
Scandanavia is like a petri dish with a thriving germ culture that has had very little exposure to many other competing germ cultures. It's easy to point to that little petri dish and say, "See how well this culture thrives?"
We don't have that luxury in the USA. Here, we deal with many self-interested gene/meme contributors who are more self-interested than community-interested. If we implemented the government and laws of Norway here in the US tomorrow, we would collapse. Too many here would take the free government support as a right and live off of it until the whole system failed.