They are also lucky to have cheap electricity from hydro.
It isn't that cheap anymore. New undersea cables to Europe means we can export/time arbitrage a lot, and that increases prices.
So the Norwegians are getting even richer, great!
No, individual Norwegians are getting poorer because we now have to pay closer to European market prices for electricity. Mind you the weather this summer was so wet that the prices went negative on a couple of occasions.