In practice however democracy doesn't work in the US. The system allows a duopoly of two parties which have long ago been bought by corporate interests. You actually need laws in a democracy to prevent government from being taken over by special interests.

In Norway we traditionally secured this by strong limitations on the usage of political ads. Hence you could not fund yourself to political popularity. The other mechanism is that starting a new party is very easy in Norway, so as soon as established parties are not representing the interests of people they will get squeezed out by new parties.

I think what helps Norway, is that we don't view our constitution and political system as an immutable document. We have been far more willing to tinker with the system and improve it than in the US. I think this is down to the fact that getting where we are today is a very gradual historical process.

When our constitution was written it was not a full democracy. It still involved a king with considerably political power. In the US, the country begins with a pretty good constitution very early on. This I think has enforced the myth that there is no need for regular updates and improvements.