The FCC and Verizon / ATT / T-Mobile allowed the phone system to be ruined in this country by continuing to route calls for spammers and scammers for decades. It's handfuls of people and organized crime causing the vast majority of the problems. Instead of actually investigating this stuff and shutting it down systemically and throwing these people in prison, they let it get so bad that we're just deciding as a society that we'd rather not have real-time voice communications because the few companies that run them haven't been good stewards of the technology.