There's a reason every country with a sovereign wealth fund is a dictatorship, its a really handy way to launder money, steal. Which is why Trump wants it.
To play devils advocate, the fact Norway has a coherent society/population makes it dictatorship of the demos. Which of course is evil since people who refuse to integrate into society aren't allowed to dicate terms.
One working model versus a dozen others? Kind of like, I didn't wear a seat belt and lived, so guess we don't need them.