A writer pushing their political agenda is one thing and something you can't quantify. Is there a department at ABC whose sole job is getting politicians to pay for guest appearances?
This is key. It's one thing to have creative staff that lean left, it's another for the injection of political propaganda to be the product itself. In that case, there's incentive for ever increasing amounts of propaganda (until it becomes so omnipresent that there's no marginal benefit to the buyer to having more of it, which would be pretty dystopian).
