I read that paper when boiled goose posted it. I think it's definitely interesting but, as I noted to him, I'm not convinced that "the government doesn't do what the polls-tested best outcome is" is equivalent to "the government is corrupt." Sometimes the polls-tested best outcome is actually incoherent, like when people want to cut taxes and increase spending on everything except foreign aid, or just wrong, like when people oppose raising the debt ceiling.
Part of the point of having a republican democracy is specifically to temper the potential excesses of direct democracy. So showing that the system does that is not necessarily evidence that the government isn't serving the people.