The problem is that extractive industries drive Dutch Disease. A Sovereign Wealth Fund can fight it, but Dutch Disease will have an effect. (The other thing that can be done is to have the entire country save more, by running a budget surplus and encouraging individuals to save more as well. This is... somewhat hard to do, in practice, without incredibly strong social cohesion.)
It's a lot easier to do when important sectors of your economy aren't addicted to consumer credit. People don't buy tankers full of oil on credit cards, but they do buy Fords.
Blaming debtors for indebtedness is like blaming heroin addicts for drug-running. It's a two-sided market, and savings gluts can and will drive down the price of credit until the market clears.
