I kinda agree with GP: when someone isn't specific about where they're from, then nobody can really respond to them. It's like when people say they're from Europe or how great things are from them there. Even if you wanted to look up how your argument applies to their country or how their country addresses your point, you cannot.
The point is that I can't determine where his country's wealth comes from if he doesn't state his country. Also I'm skeptical f this person actually even being from the region. For example, if he is from Norway most of his wealth is derived from oil.
Thanks to fracking, the US is actually a marginal net exporter of oil, depending on the average price of oil (traditional wells can squeeze out frackers with their lower production cost)
As you said, oil helps, but it’s not determinative. Norway is interesting in that they’ve used their oil money very wisely, but it seems pretty clear that other policies are necessary in order to ensure that economic prosperity is well distributed.