Earlier quoted context omitted.
Yeah, I do not see how stopping the spoofing (which I am all for doing) would be anything but a minor inconvenience for them.
I think the subtext is that given valid caller IDs, then block lists can be made. The US FTC might manage them like it does the do-not-call lists, or the perhaps the US Attorney's office, after some criminal complaints. Ideally, the telco would implement these block lists, but also ideally, they could be traded around like web ad block lists for individuals to load on their phones. I think we all know scam calls are…
Why would they be a major revenue source? The carriers make their money from normal users, not dodgy call centers.