That is because they do not have as many special interest groups demanding vegan meals and the like. In that part of the world meat is still considered a staple. As are vegetables that are not canned. The rest of the world that is not starving - which excludes large portions of Africa and middle east areas - usually eats a reasonably decent meal - far different from what you see in our world.
And by the way - nearly all UK school meals are now Halal due to demands of the islamic population. Do not believe me? Look it up.