I would structure that differently: the telco pays the fine immediately, but can collect with damages from the source. That ensures that consumers are compensat

I would structure that differently: the telco pays the fine immediately, but can collect with damages from the source. That ensures that consumers are compensated without delay and gives the telco a strong incentive to be serious about collecting and/or blocking anyone without a robust legal presence. Most of the problem goes back to the decision in the VoIP era that checking ID would slow revenue growth so that needs to be robustly corrected.