When are health inequalities a political problem?

Is it possible to define criteria by which a political decision on which inequities in health should be addressed can be made? It has been suggested that differences which are unnecessary and avoidable and those which are unfair and unjust are inequalities which should lead to political action. In the article it is argued that it is not possible to make a clear distinction between avoidable and unavoidable differences, and that the extent to which differences are considered unfair depends on political and normative standpoints, and generally acceptable criteria can therefore not be established.