Actually that's choice between eating cheap food and not eating at all. Food rich in carbohydrates is usually cheap and that's what majority of people eat - but for majority of people that means gained weight.

As well your examples are very weak and can be beaten in minutes using google:

* http://www.msnbc.msn.com/id/15954744/ns/health-diet_and_nutr... - deciding about Africa from 0.01% of its population (specifically Bushmen that are usually covered in documentaries). I don't know.

* http://www.vietnewsonline.vn/News/Society/Health/9483/Childh...

* http://lmgtfy.com/?q=Auschwitz+fat+guard