People live longer and are expected to work outside of their homes longer. Two generations ago when my grandmother was raising my mom, her mother was not workin

People live longer and are expected to work outside of their homes longer. Two generations ago when my grandmother was raising my mom, her mother was not working and could and actually did much of the childcare; but my mom can't watch over my kids much because she's obviously working full time and most likely will do so until my kids are nearly adults. This might be different for people who have kids much later; however, in modern society there IMHO still is no gap where the grandparents already can look after kids because they've retired and still can look after kids because they're physically and mentally able to do so, because most non-rich people tend to work as long as they can, and when they stop working, they themselvelves need caregivers instead of being able to be caregivers for the extended family.