Before about 12,000 years ago, humans primarily lived as immediate return hunter-gatherers. There was no way to accumulate wealth, so this problem didn't exist. There was no financial burden involved in leaving a relationship.
I am not advocating for a return to hunting and gathering, but I believe we can design a new system, based on equality of decision-making power, that avoids the pitfalls of our more recent hierarchy-based systems.
I focus on the system rather than on individual people because I believe people ultimately act in their own best interests, and that the system is what defines those interests. If we replaced every politician with someone else, but left the system the same, I don't think any long-term change would occur.
Here's an excellent YouTube video explaining this in more detail. This YouTuber has a whole playlist on political theory and anthropology that I cannot recommend enough. https://www.youtube.com/watch?v=T2LRn9LM4jY