人在年轻时候总要做些储蓄以备老来之用。在一个人口结构正常稳定的社会里,中年人储蓄,老年人、青少年消费。等中年人老了的时候,他们的孩子又成为中年人,而孩子们的孩子则成长为青少年,新的中年人储蓄,老年人、青少年消费,这样的社会,作为家庭和社会整体可以不储蓄。这样的社会,不需要借助国际社会来实现总供给和总需求的平 When people are young, they have to make some savings for their own sake. In a society with a normal and stable demographic structure, middle-aged people save, the elderly and adolescents consume. When middle-aged people are old, their children become middle-aged, while children’s children grow into young people, new middle-aged people save, the elderly and adolescents consume such a society as the family and the community as a whole Can not save. Such a society does not require the aid of the international community to achieve a balance of aggregate supply and aggregate demand