In Salon, Michael Lind says it's no coincidence that ethnically homogeneous countries have the most generous health care:

Could it be pure coincidence that the most generous welfare states in the world have been those of ethnically homogeneous Nordic countries where, until recent immigration, nearly everyone was related to everyone else? Is the classic welfare state really a form of ethnic nepotism most likely to be adopted by a homogeneous, indeed tribal, nation-state?