Healthcare Education and Q&A Thread

[CRedskinsRule]

In the Obama Care thread a question came up, and I want to bring it here for clarification, keeping in mind this thread's original goal of information

Specifically, I asked for a model that was based not on a homogeneous population. It seemed clear to me that a diverse population would have more stresses on the healthcare system than a uniform nation like Japan or Norway.

In Saden's response he stated

Honest, I can't quite comprehend what difference diversity makes in the field of health care? Care to elaborate with something more than "it has, don't you think," specifically why you think it does. Also, France is very good example of a diverse country with a successful universal health care and relatively low poverty rate.

So, I am asking this question:

Does the diversity of a nation make a difference in the field of health care?

Thanks in advance.