"Liquid democracy" is very cool, and it seems strictly superior to our current system. However, it will still be captured by capitalism. The most popular representatives will attract the most funding, and their actions will be as biased toward their funders as they can be without losing too much support. The big threat there is regulatory capture: promoting laws to clamp down on profitable industries, but in ways that give incumbents huge advantages because the laws are hard to comply with.

The only way to get money out of politics is to make sure the people can control money.