Don't quite know the deal between Norwegian CAA and FAA, there might be special rules, but....in JAA-land you're only allowed one year of flying on the "validated" licence. I know there have been ways to solve this, or rather "work around" it, but honestly don't think NAS is keen on doing that.
Not because they can find "cheapo" (really degrading comment BTW!!
) poles, but rather the fact that they never seem to run out of JAR-FCL equipped and experienced drivers to employ.
Might be a lot of Ryanair-pilots leaving, I don't know, but their well never seems to dry out.