Yes but the problem is that idealistic demagogues start to become preferred by the voters over people that are able to effectively create change, and suddenly g

Yes but the problem is that idealistic demagogues start to become preferred by the voters over people that are able to effectively create change, and suddenly getting things done is less effective than roasting your opponent or saying the right things. As long as the votes are still public we know what the legislator ultimately did, which in my mind is much for valuable than listening to the bluster they said.