I lost a long reply to this earlier this morning (the 2-year-old smacked a water bottle down on my keyboard), but here are some of my ideas.
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This is a fascinating topic to me and one that manifests itself almost solely on the idea of NFP (

I honestly don’t understand why this is not a bigger topic in itself) And you know of my posting history that education is a primary concern and priority for my family. As a homeschooling dad, it has to be. And academically my children are working at a little above grade level. But spiritually my children are light years past their counterparts, not only secular but even the Catholic School children. And to me, that is my most important goal. To get my children to heaven. That is our only goal. Early on, we thought that one of our children may be with us for her whole life. That she could never be independent. She has a rare chromosomal deletion and we have no idea how severely it manifests itself or not. Luckily it appears that she will be a normal person in the world. But there was a time, and honestly every parent should think about this, that we may have had a dependent forever. We still could factoring in more children. So, parentally our moral obligations are not necessarily tied to education and children procreating. And believe me, I think every parent should help a child be debt free. But that is not possible. Not every good Catholic Holy parent will be able to supply that to their children. And it is not a failure on their part or the childs part, it just is. I think in your zeal for education (a zeal that I share) and your zeal for financial independance (a zeal I also share) that we can sometimes place an undue emphasis on these issues as graced Americans. To say that a person, that a parent MUST supply a child with any sort of education beyond spiritual is placing an undue emphasis on what we call education. You know, Universities, frat parties, football games and such. With a crushing debt for the majority of people. And even if some parents CAN pay for school for little johnny and Emily (notice I only named two children) Not everyone will be able to do that. Schools have to make money somehow, so affordable debt free education is never a reality to the vast majority of the world. And in this world of vacations, cars, boats, organic baby food, and cloth diaper services, we also add up tens of thousands or even hundreds of thousands of dollars for a college education that to be honest, not everybody needs. I spent over 100,000 dollars on my two degrees. I have no debt, I used my father’s inheritance to pay for it. But I will never get the money’s worth out of it.

I will never make up for that initial cost. And honestly, if people have large families, usually one person stays home. So I will not ever work again in my field.

My wife, as you know, just graduated with an MBA. This comes 10 years after her last degree. Did we have the 60 gs to pony up for the degree? Nope. So we become slaves (like you said) Either a slave to a loan, or a slave to a company. (Many companies require a term contract if they help with your school)
Underneath all of this I think is a thing no one really talks about anymore. But reared its head recently at the synod on the family. Lost in all the sensationalistic media hype was the idea that the third world Church (Africans) and the west (Germans) are not in unison. This was glossed over and moved on from but it is a reality that is worth exploring. It is not about conservative or liberal it is about the purpose of family. And it seems that modern (educated) society has been ignorant of some pretty basic things lately. In the west, we have lost the simple life and faith that many in poverty (true poverty not I can renew my foodstamps on my celphone poverty) could teach us more about. ESPECIALLY with the family. And since morality is uniform, since God’s law and Will is for all, perhaps we should listen more to those who perhaps get married and have a child in a persecuted land, or a starving situation, these people cannot write a dissertation on Holiness, or how to discern how many children to have, they have no education to do so, but they can teach us how to love and what God’s purpose is of children and family.
Bottom line, while I agree with you that every parent should provide the education their children need, I think that it is obviously limited to what they can do, and if I can’t pay for all 5 (so far) of my children to go to some ****** university, I hope that they value their siblings souls and company more than their own debt free ness.
While financial reasons can be a thing to base discerning another child on, only having a certain number of children so you can pay for their college is well, just plain wrong!
And of course historically you have a different view. The majority of the world, the majority of God’s saints, and the majority of marriages that have brought forth life, have done so in slavery, poverty and illiteracy. From the Jews in Egypt, to current Catholic couples in Iraq that are discerning if they should have another child to replace the one ISIS has just chopped in half. To a persecuted family in the Holocaust.
No, University or “education” is not a sole factor to value a human life at.