European authorities haven't managed to do anything about the car selling scams Romanians have been running for decades now. Nobody has managed to do anything about the Nigerian prince scams. BEC with truly shitty phishing pages keeps on growing and growing.
The best bet would be for US authorities to force India to crack down on these activities and prevent these scams from operating at an industrial scale.
The actions you propose would work well to address lower return activities, such as marketing robocalls. They can not work to address high-return scams.