Why do you need PR when the parties responsible for all this wrapping are corporations? It’s not the dagashi down the street giving you six layers of wrapping.
When big corporations are doing something you don’t like, you don’t use PR to fix it. We’ve had plenty of PR about recycling in the US and it’s affected consumers plenty and corporations not—at—all (except where the responsibility ends up in the hands of individual consumers, like office managers.)
No, the way to make corporations change their behaviour, is to just make a law about it. For example, a “consumer waste reduction corporate tax incentive.” It’s the bottom line that says that extra wrapping is good (for some reason); so it’s the bottom line that needs to be convinced otherwise.