It's incredibly irresponsible to see this and think "not my problem". This is the one form of discrimination that eventually comes for us all, unless you get rich or die first. And yet, does it come up in discussions of diversity and inclusion? Rarely, and if it does, pretty much just as an aside. I've never seen a company that had goals to hire people in certain age brackets, or even bothered to offer an age breakdown of recent hires, as they do with race and gender.