It's even more depressing than that. Those who are on ballots are there because they've gotten Corporate America's stamp of approval. The ones who don't have said approval never make it on the ballots, and in the extremely infrequent case that they do (see Bernie Sanders) , they are there so corporate friendly politicians and media outlets can mock them as a subtle reminder to the rest of the country that the corporations own the country and it's not worth stepping out of line.