Lots of companies target old people making them purchase stuff they do not need at all, it is regular companies, even banks,
They target my father in law like this. It is sad, but my wife and her sister don't want to take his control away - even though he has lost it himself.
Most Grandparents Love to spend time with their grandchildren, but not to the point where it becomes a non paying daily job
I think it should be a paid job!
People who babysit their grandkids can get extra money for their retirement, so that the parents can concentrate on other things as well. A bit like in tribal society where the elders taught the young, while the parents hunted and gathered.