There are real problems that need to be dealt with, no? For example in G7 countries the ratio of older to younger people means there will be a larger need for health care professionals and that would take up a larger proportion of the workforce away from say, working on infrastructure.
If I'm understanding you correctly, that's not really a meaningful problem (it is for capitalists as that decreases certain types of growth and profit) or at least one that can't be readily solved through central planning?
Also also, is it related to pitting the supposed interests of different age groups against one another rather than cooperatively solving issues that arise?