The concern that older members of the society benefit disproportionately more than younger members of the society in terms of national allocations of resources is called?

Intergenerational inequity.

Explanation: Intergenerational inequity in the context of Psychology and Sociology can be defined as the concept or idea in which different generations benefit disproportionately in terms of treatment and interactions.

In this case, the older generation benefit way out of proportion than the younger generation. In terms of fairness and justice in the society, this is not acceptable according to the principles of equity which advocates for equity among members of society.