You might as well give this one up. It’s never going to sell. Families are the cornerstone of civilization, and will always be favored in our tax system. I promise, you won’t see it undone in this lifetime.
I dunno... back in the 90s when I was married the tax code penalized married people and favored single people because the knuckleheads had the tax codes so messed up. But technically, you're right.
Family is indeed the corner stone of civilization.
Why do you think there are less divorces on the Asian continent than any other. But family integrity has nothing to do with tax breaks. That is no different than the welfare queens who never stop having kids because each additional kid brings in more benefit checks.
If you want more kids, more power to you. Just do not expect the single tax payers, the empty nesters, the retired, etc to support your larger no. of kids via tax breaks.