The above is a very concise version of my thoughts, thank you. There are a lot of problems with democracy, stemming from the dangers of mob rule. For instance, there are some strong arguments that a senate operating behind closed doors would be more effective at ignoring special interests and working together than otherwise. The writers of the constitution did just this (they swore secrecy of anything they talked about in the convention to avoid voter backlash) [1]

This is why they initially wanted health care debates behind closed doors - the lobbyists can make much more use of transparency than the uninterested voter can. Fareed Zakaria wrote a lot about this in The Future of Freedom: Illiberal Democracy at Home and Abroad.

[A Brilliant Solution: Inventing the American Constitution by Carol Berkin]