Norway's is the only Scandinavia country with substantial amounts oil. Taxation is largely what is funding the welfare state.

That may be true, but all 3 countries are tiny with a large natural resource sector (so is Russia, incidentally, except on the "tiny" front). None depend on manufacturing or resources, despite all their European neighbors doing just that. Of course, sure, only 1 has a real oil sector. Like the middle eastern countries, though, Norway is somewhat guilty of sabotaging their own agricultural sector to appease political interests (ie. the greens), and compensating large amounts of importing from their immediate neighbors.