This isn't a problem unique to Norway, Norway is just one of the biggest offenders, even in the Nordic countries there is a trend of creating a new generation or class of indentured citizens.
Many EU countries need to look at germany and start reducing housing prices, one of the main contributors to Germany's low household debt is a 10 year cap on mortgages.
Countries like Sweden and Norway just now starting to cap it, Sweden capped the mortgage term to 105 years (no this isn't a typo) this year and the current average mortgage term in Sweden is still over 140 years, and Norway isn't much better off (It was slightly higher than Sweden IIRC I just can't find a source atm).
While the Nordic countries take pride in their model the current economics are pretty bad under the surface, you have a combination of inflated housing prices, extreme housing shortages, and mortgages that can span over 3 generations.
To some extent the Nordic model isn't a choice it's an outcome of the economic policy to the point where a lot of people that appear to be wealthy are actually in dire debt and dependant on the state.
http://www.telegraph.co.uk/personal-banking/mortgages/sweden...