Its also parroted by the left because we can see the corporate backers funding the various politicians.

Citizens United was the greatest coup the ruling class could have gotten (before social media anyway), and its made it trivial to corrupt our politicians. And we can see how stances change or how there's always juuuuuust enough politicians to vote for some horrible bill to pass or kill a bill good for the people. Its kinda sad how many people don't see this.