Campaign finance reform is a bad idea. Not only would it also limit legitimate free speech it also wouldn't solve the problem. The real problem is excessive power in the hands of the government. Today congress has its fingers in every industry, to a degree that can easily result in causing the success or failure of one or another company based on their more or less arbitrary decisions. This creates a natural need to try to control or influence that power. If we take away the ability to contribute to campaigns then corporations and moneyed interests will simply turn to more direct forms of corruption.

In short corruption is a symptom, trying to stop the least objectionable types of it will merely drive it underground and more direct. The problem we need to solve is the ability of corruption to be successful.