Earlier quoted context omitted.
Counterpoint: 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 ma…
The problem with that argument is that it requires voters to trust their representatives' competence and motivations to represent their best interests behind closed doors. That trust is in really short supply right now.
Accusations of corruption are a common framing argument; if I can get you to believe that my opponent is corrupting the system, I can make you believe almost anything about the issue or their point of view. This is much harder to do if both sides negotiate privately and then jointly present a compromise.