It has been well noted that this reduces to advertising budget, which lays bare the farce that is democracy. If it weren't a direct mapping from money to power, we wouldn't need campaign finance laws.
You can't change this because this is the way the system was designed to work. It is a system for legitimizing the authority of those with money and power using the branding of "the will of the people".
Funny how the people's will always lines up with the interests of the largest corporations, employers, and landowners, despite their being a tiny minority of "the people".