>For example: Pharmaceuticals are often priced much low in poor countries. That's price discrimination. (You could think of it as a primitive form of surveillance pricing.) But if that were banned, pharmaceutical companies wouldn't lower prices for everyone. That would destroy almost all their revenue which comes from high prices in rich countries. Instead, they'd charge rich-country prices to everyone, and most people in poor countries would simply have to go without. That seems like it would be pure harm.

Well you simply make it illegal to charge more than the poor country prices and, bare with me here, you also make it illegal to go bankrupt.