In other nations (e.g. Mexico, Peru, Ghana, Thailand, etc.) health care is provided to all. In USA lots of people can't afford any sort of health care. The family left behind by someone who dies at 48 because he couldn't afford e.g. blood pressure medication doesn't need any sort of "focus" to see the divide.

Health care is just the starkest illustration of this. One sees the same phenomenon with any other necessity: housing, food, transportation, etc.