100%.
How much better would the US or UK or wherever else be if our wealth of natural resources was shared instead of hoarded by private land-owners and SuperMegaCorp?
Norway drills about 1/4 of the barrels we do here in the US, but reaps more than double the revenue into public coffers. ~78% tax rate in Norway vs a published rate of 21% in the US (and a real rate of <10%).
True but even if it was 100% the amount of money per capita would be tiny compared to Norway. Only some of the smaller gulf states are comparable to Norway.