By your logic the government should never regulate or penalize any of our already regulated industries for fear the costs would be passed on to customers. Stockholm syndrome much?
Again, to assume that these telecoms aren’t already working to prevent robocalls but just assuming so is irresponsible. When did I say governments shouldn’t regulate bad practices? Telecoms aren’t robocalling anyone!
Your line of reasoning is just another tax-the-rich scheme without a barebones understanding of who makes a profit for theses companies in the first place. Use your noggin’ now.