Yeah, I think the party system is to blame. There is too much closing ranks in government policy and not enough independent thinking or voting. And yes, it is a serious flaw of the US Constitution that it only allows them to police themselves. But how will it ever change? And if it were to be changed, would it be better or worse? Good lord, did anyone really doubt the outcome of the government determining whether or not unlimited money from voting interests would be acceptable to them?
Could you imagine those same people rewriting the Constitution?