It has nothing to do with multinationals. Same thing happens inside, on national markets. Clients are segmented by providers of goods/services based on what see

It has nothing to do with multinationals. Same thing happens inside, on national markets. Clients are segmented by providers of goods/services based on what seems to them realistic assumptions of their wealth and/or will to buy their products. Those who are thought to have more cash on hand, or more in need of the product 'here and now', are charged more. It can have variable success because estimates may be way off, but that is the goal. Going onto international markets, country is a very good criteria, because GDP per capita is a well known hard figure. It would be stupid not to use it as a segmentation criteria.