This should not be possible. I guess the iMessage scams used e2ee, but the SMS scams should have been caught. It would be great if there was law enforcement that competently handled cybercrime, or at least triaged it.
More broadly, and at the risk of creating another TLA, the US needs a Blue Team version of the NSA. In other words, identify critical infrastructure, figure out how it can be hacked, and require that companies fix the issues. Use national security if need be. Banks have to undergo stress tests to prove they are solvent, there is no reason that critical infrastructure should be able to leave their doors unlocked.