To my mind, there's a difference in the relative size of the oil windfall. The UK has over ten times the population of Norway, so in effect the sudden cash income just doesn't compare to the Norwegian experience. The UK enjoyed similar benefits in absolute terms, but per capita it was much, much less. For the UK, it wasn't a game-changer, but for Norway etc, it was. The UK did not become "rich through oil", but Norway did.