The point of this entire post is to try to illustrate how you do not have to buy out an entire political party, when you only have to get to those on the margins of a majority.
You put all democrats into a little box, things are more nuanced than that. Yes, people with tons of money have tons of influence is US politics, this post illustrates specific names and examples.
Do you have anything to add to this conversation, or do you just want to paint with broad strokes?