Evidence Scandinavia is about as poor as Mississippi, Brazil and India:
http://www.instapundit.com/archives/000519.php
http://www.nytimes.com/2005/04/17/weekinreview/17bawer.html?ex=1271390400&en=44ea05b3e068feb5&ei=5090&partner=rssuserland&emc=rss
I have nothing against Sweden, but I think you are exaggerating the importance of this survey.
Look at them. They use the term "Burger Index" instead of the proper "Big Mac Index," but then suggest an "[you]Pod Index" instead of a more general "MP3 machine Index."
How much is it in Iran?