So in your view well regulated telephone networks could not feasibly ensure every call has origin data? Not even to the level of upstream origin to the supplier

So in your view well regulated telephone networks could not feasibly ensure every call has origin data? Not even to the level of upstream origin to the suppliers network? In other words, they have no idea where calls enter their network from; a corollary of which is they don't know which company to bill for any of the calls they terminate. Companies purposefully allow false origins for call centres, and purposefully carry calls from spammers for financial reasons (they get paid). It's not a technical problem. What you describe is an historic problem, not a technical inability to act.