Couldn't that just be an consequence of how most people's needs are served by a small number of massive companies?

Think about how much trash you generate. How much plastic ends up in landfills due to your buying habits. This isn't a dig at you. There's really no practical way to avoid it. Now we can say Company A is responsible for making all that plastic wrap so let's get rid of Company A. But the demand still exists and will be filled by some other company or companies.

Let's just look at medicines. Almost every fish in the ocean contains modern pharmaceuticals in its system. Think about that. To me that is staggering. Excess pharmaceuticals have been thrown down the drain in sufficient quantities to have entered the bodies of the world's fish.

Ok, there are going to be 9 billion people by 2050, and I believe the birth rate is already low in the developed world.

We are going to need a better solution.