Indeed. As I see it (and I have lived in socialist and capitalist countries as well as developing countries) there are really only two problems. 1. People in power don't want the system to change because it's a threat to their position. 2. People with low education and no means to support their own kids keep having large families.

We can solve #1 by just vetoing the current government and replacing it. But #2 is difficult to solve because we should not be comfortable imposing reproductive control on humans from the government. So popular education may be a good thing to focus on: lower birth rate, lower problems, higher productivity.