They’re still racist BTW
When the Dutch discovered vast natural gas deposits in Groningen in 1959, they started extracting and exporting the gas as fast as possible. The high exports increased demand for the Dutch currency, the guilder, which caused its value to skyrocket relative to other currencies. And that in turn made other, non-gas Dutch exports too expensive to compete on international markets. This ultimately decimated the manufacturing sector and raised unemployment in the country. Paradoxically, the huge windfall ended up hurting the economy.
If we recall our history books properly, the same thing happened to the Spanish economy after they sacked, raped, and pillaged their way through the New World.