Let's say you go to a hypermarket to buy a few things like groceries, clothes, a TV and a rubber duck for the bath tub. They all have prices with which you more or less agree so why not see how much the products cost to be built (the average pay of the workers, cost of raw materials, transportation, etc). I believe that this type of information would improve consumer awareness and will give everyone the possibility to put an end to "modern slavery" (insane amount of work hours with almost no pay). My belief is that people will think twice if they should buy a product that was made by those living on 10 euros per month.
I don't know if this type of thinking is implemented anywhere but if it is, please share your facts.