What made me think about this was your comment about families being smaller so there were less resources to care for the aged. This seems to be a problem directly related to the contraceptive mentality of our age. Also, the fear of caring for the dying and the sick is also tied in with notions of selfishness and fear which are the key vices of the contraceptive mentality (which is the root of the abortion culture). There is much more that is coming together in my mind but, perhaps, you see where I am going with this.
First of all, I just want to say that times and the economy are different now, and it makes it more difficult for people to support more than 1-3 children. We can argue about it until our fingers fall off from typing (not really addressing you, and not really wanting to debate it

) but the fact is, the ability of a family to financially, emotionally and physically care for multiple children varies from family to family and region to region. And the degree of “sacrificing” will vary from family to family. I’ve seen people list private school as a priority for their children, or the ability to afford music lessons, or dance lessons and others claiming that this shouldn’t be a priority at all. On the flipside I’ve seen people claim that they don’t care if they live in a one-room house as long as they can continue having children, and if that’s what it takes to “afford” more kids, that’s how they’ll live. But everyone has their priorities and their “standards”.
But the fact is, providing a comfortable home for one’s family is part of responsible parenthood.
There were many reasons for having large families in the “old days”, among them was the fact that children in the bibilical times had the odds against them when it came to living past early childhood. Also, the more children they had the more chores could be divided up and more food could be brought to the table. It was more of a burden then to have one or two, than to have ten. Today, some families find it difficult to support just one. That said, from what I see, only the very traditional and conservative Catholics and Jews have very big families, with few exceptions. Most families I know, despite creed, have one to three kids. I don’t even know anyone with more than that.
However, I have seen people in nursing homes with families that I find could be more than capable of taking care of their elderly family member among them. So (especially with today’s seemingly lack of morals and lack of integrity, and “me” attitude) there is no guarantee that just because you have a lot of children, that they will step up and take care of you when you’re older or sick, or both. My mom’s ex-husband has 7 children from a previous marriage, half of whom are in the medical field, and together he has 25 grandchildren, the oldest one reaching his 30s…none will take care of him and he died in a nursing home.
My mom only had my brother and me. I am happily single and I am my mom’s sole and primary caregiver. And I can’t even express in writing or in words how grateful and how blessed I am to be able to care for mom at home. It would devestate me to have to put her in a nursing home. I pray that day never comes. It would kill me and I’m sure it would kill her. When I go to work, I have a girl come in to watch mom. Mom pays the caregiver out of pocket from her SS check, and it’s quite expensive. My brother does not help at all whatsoever. So it’s just me and mom. Yes we have a small family, but my mom has two children.
So again, there’s no guarantee that you will be cared for just because you have a large family…