These are not "assumptions" about "the degradation of our democracy". They are factual assertions about the structure of democracy as a system of government.
I'm not sure what that would add when his point is that if people were anywhere near rational about this, there would be no need for such a podcast because these would already be features of our democracy, demanded by the people.
They are not at all factual statements. The elite conception of the issue has become so indoctrinated in the population that it has become fashionable to regard them as such. Liberal authors are starting to come out with books that attack the idea of democratic governance. This is a bankruptcy with elites, broken structures, and a failing of liberalism (but not of radicalism).