That's because those generics have already been through the capital intensive process of getting FDA approval. The monopoly is intended to incentivize actually

That's because those generics have already been through the capital intensive process of getting FDA approval. The monopoly is intended to incentivize actually bringing the drug to market. I suppose there are countries without this process, but I also would wager they do not produce nearly as many new drugs (or new orphan drugs) proportionally to the US