The very idea that it's irrelevant what's on the other side of a shipping line is both a powerful abstraction in economical theory, but in real life an almost p

The very idea that it's irrelevant what's on the other side of a shipping line is both a powerful abstraction in economical theory, but in real life an almost perverse ethical dilemma. It's easy to construct a thought experiment where you fill a container with dollar bills and receive another container filled with goods, and calculate that the maximum efficiency i.e. profit involves starving respectively working people to death in both ends of the shipping line.