> (largely) privatized the costs of children solely onto their parents.

The single greatest component of the property tax is the local public schools. Federal taxes pay for free lunches at those schools. Approximately half of Social Security’s budget go towards needy families. Over half of college students receive federal aid, and over a quarter receive state aid.

To privatize something implies motion from public to private. What costs of parenthood do you believe have been privatized over the last 200, 100, 50 or 25 years? I genuinely don’t believe that there’s a single one, but I sincerely know that I could be wrong.