My vague idea is aimed at designing a game that brings different stakeholders in society together to participate in visualizing the way environment-friendly companies can exist in the current economic system. How could they appeal to the shareholders, customers and public in general?
I think your question is really interesting and you can have a lot of different directions that you can take.
I think @g.ferri session about “serious” games could be really interesting to you.
I think one very interesting example is also a game that Department Gier designed and run few times now in Russia, Poland and Bulgaria.