Unfortunately most of the culprits nowadays are overseas scammers, in which case it’s no help. I would agree in that case- the only way to stop these folks is through the carriers themselves and they don’t seem too keen on doing anything.
Yes, it takes time and skill, but then again, between the TCPA and state statutes you could potentially recover close to $6000 per call. Now when you negotiate a settlement you may not actually see that much, but you are definitely getting the attention of the offenders, and just the process of responding to your complaint (lawyer time) will take another few thousand dollars out of the pockets of these cretin.
As far as oversimplifying political hypotheses go, this is a stupid one. Multinational corporations have fragmented power structures. They're broadly owned, publicly audited and subject to coups through market-based means.
If you want a secret cabal, America's emerging aristocracy is at least concentrated, opaque and difficult to dislodge.