Citizens’ United Ruling A Mistake

The issue I have with Hon. Justice Ruth Bader Ginsberg’s statement is this. She concludes that Citizens’ United ruling was “a mistake”. An error. 
I quite understand that the court, like all other institutions, is fallible. Had the ruling been unanimous, one might allow for interpreting it a mistake.
But there are some troubling facts. The court ruled along very predictably, ideological lines. Second any person, just applying minor problem-solving skills or good old common sense, could foresee the consequences.
 My fear, frankly, is that we all have already been bought and sold to a roomful of extremely wealthy individuals. They are secretly writing laws, policies-whatever they wish and having them executed by individuals who gutlessly comply on pain of losing gerrymandered elections. Mistake? I don’t think so.