Supermarkets and plastic

Have you noticed how much packaging, especially plastic, is used in supermarkets these days? When I was a child we had none, really.

Why is it so hard for supermarkets to make clear which plastics can be recycled? Why are not ALL plastics used in supermarkets recycled? They all have a lot of power over their suppliers and should INSIST on this.

Basically, I hate plastic packages for so much, especially when it cannot be recycled.