The current problem is a kind of technological loophole. Scammers outside the US can anonymously and for (almost) free perform what are basically phishing attacks on everyone with a phone. Unlike other kinds of internet-based scams, there is no technology layer like spam filters that can screen calls for people since they spoof whatever area code and number they want. It needs to be fixed.

And you should read about these "scammer districts" in India. They didn't exist not that long ago and sprang up overnight as this "opportunity" arose. Most of the employees aren't exactly the cream of the crop by India or anyone else's standards. Make it take more effort and brain power to scam people and you drastically reduce the number of scammers.