Opposites project, plan

Since my theme is materialism I need to find objects and pictures that go along with that theme. Instead of using paper, I will be using two shopping bags, one from a clothing store and the other from a super market. This is a clear opposite in materialism, buying what you want over what you need. Next I plan on cutting squares out of the two bags and sticking pictures behind them. The pictures will not be the opposites of the bag (I would still use a fashion magazine picture in the clothing store bag) but put next to each other will show the opposite. Next I plan to have pictures "shooting" out from the tops of the bags and intertwining(?) with each other. For those pictures I would have food coming out of the clothing store bag and visa versa.