https://www.youtube.com/watch?v=iOtrvBdRx8I
https://www.youtube.com/watch?v=fuwaOiTHl7U
Tl;Dr charge the producers of packaging for what happens to it after use.
They respond almost immediately to that financial incentive by both reducing unnecessary usage but also improving recycling of what is still necessary because it's the second best option after funding cheap propaganda to pass the buck onto others.
Contrast the latest form of that cheap propaganda, which is to point fingers at oil companies for promoting recycling that "can't economically work" with the reality that when their own money is on the line they adopt it rapidly.
Meanwhile America is doing that "Only developed country that is failing to do this claims it's not possible" thing again.