So this is a big misunderstanding. Social Democrat countries often do have more economic freedom than Capitalist countries. When you have "small government" the rich get richer and then use their extreme wealth to bribe politicians into making regulations that help them. Truth is, there is no such thing as real "small government." If a country is Capitalist, they have regulations that help the rich. If a country is Social Democrat, they have regulations that help the working-class.
So yeah, the Nordic countries do have more economic freedom because they don't have rich people making regulations to keep small businesses from growing. I'd argue that the German-speaking countries also have more social freedom. Prostitution is legal. And while drugs aren't, the laws against them are often unenforced.
If you look at Sweden, the economic freedom I was talking about isn't that different from our economic freedom. Sweden has been reducing its regulations, not increasing them. This has been an ongoing trend since the 90s. As a result, they've risen in standard of living and median income.
The other Nordic countries have followed suit but at a slower pace. All of these countries had to reduce regulations and government due to economic stagnation. You might be able to argue that their regulatory structures are less corrupt than ours, but reducing regulation has been the key to improvements in quality of life.
All of the Nordic countries are capitalistic. They could be described as Social Democrat as well, but Social Democracy works alongside capitalism. It's quite different from Democratic Socialism, for example.
I disagree on the social freedom thing though. America beats just about any country on that. Yes, we have fewer freedoms to do drugs, but we have vastly greater freedom of speech and an actual right to bear arms.