You keep saying that money is all that matters, and then when someone points out that voters in the past few cycles have regularly been voting against campaigns spending far more money than their opponents, and that many politicians forgo lucrative donors because they're morally/ethically opposed to them, you just claim "GOTCHA"?
Your thesis doesn't make sense. Money has existed for thousands of years as a lubricant for economic activity and a store of value, and will continue to be around for thousands more as long as we don't kill ourselves off. Money is powerful, but it's not the end all be all. That whole "priest, king, banker each ask you to kill the other two" thing from GoT is a good way of framing this for electoral politics- people's priorities and values aren't the same. And not everyone is just bribed 24/7, even though economic realities will often constrain political decisionmaking.