This line of thinking does not only apply to a Libertarian form of government (or lack thereof). Influential and wealthy individuals control power, and I think it's incredibly naive to think that Democracy or any other form of government out there is completely immune to that.

Note how I don't single-out wealthy individuals. Our society is run by influential people, the kind that can sway opinion through oration and manipulation. They will simply convince more people to use their single, noble vote on what they want.