12 Minutes to a Big Mac Attack

The Economist publised a brief article that shows the purchasing power of wages in big cities around the world. And the purchased item used for comparison? A McDonald’s Big Mac hamburger. Workers in Mexico City, Mexico, must slog for 2.5 hours to afford the same Big Mac that Chicagoans can get in 12 minutes.
Thoughts on the accessibility of food around the world and its effect on whole-population health?