This is impossible for the foreseeable future given that we have a conservative super majority in the Supreme Court who see corporations as people but also special people who don't have the full responsibility that regular people have as far as the law goes. This allows PACs to spend unlimited money on elections as long as they don't wink wink nudge nudge cooperate with political candidates/campaigns.
This doesn't fix the section 174 problem at all. It also doesn't fix how Congress would operate. Our politics have become ridiculously polarized and Congress won't even work behind doors together. Many people go to Congress to become famous, not to get stuff done. We have lost the element of compromise, as everyone just panders to their base.
You have yet to make an argument how campaign finance reform would change any of the above.
