Great political ideas come, not from committees or from random samplings of the uninformed or semi-informed masses, but from intelligent and forceful leaders who can think them through thoughtfully, who can articulate them in a way that resonates with people, and who can set out an agenda to carry them into effective action. None of this is easy to do and it takes exceptional people even to make a credible stab at it.
There is no need to bring in modern politics to illustrate this. Any glance through the Federalist Papers will quickly show to any informed reader that one can take very difficult and highly contentious topics (how to form a country, how to divide its power among different groups, how to limit its power decisively in furtherance of broader principles such as natural law) and make well-reasoned and even brilliant arguments about them in ways that compel people to action. The people who made those arguments were steeped in a lifetime of ideas and imbued with a strong philosophy about the principles of right government, and it showed in what they wrote - even when those writings essentially took the form of propaganda pieces (which is really what the Federalist Papers were).
You won't get this from a website such as the one featured in this piece. You won't get it from Democratic Underground either. Leaders are leaders and hacks are hacks. The world offers the latter in abundance but good leaders are a precious few. This is not to say that normal, day-to-day people can't have good ideas or be intelligent in a political sense. It is to say that the intelligent articulation of such views won't come out in a mass setting and that is why political parties are ultimately driven by insiders (who are, one would hope, effective leaders) and not by soliciting random views from the street.