The oil embargo by the US was the major factor; after they evolved into a modern country, they were expected to return to the Stone Age. Indonesia was the solution to that problem; it provided the oil to keep them going.
You can bet that if the US had no oil we would have invaded the Arabian Peninsula during the embargo in the 1970s.
Oil was the short-term problem, but they were heading down to Australia for minerals. Not a lot of oil there. They’ve been proven right. America guarantees their needs to keep industry going, but they’re on a leash.