Whaaat?
I have 2 kids and I can assure you healthcare is far from free unless you are low income; cutoff varies by state but it's not high -- around $80K/year household income[0], which is pretty middle-class. We're not at all wealthy, but a few years ago we started making more than threshold for our state's Medicaid/CHIP program, and we now spend >10K a year for our kids' healthcare (granted we have a child with a disability so he's the bulk of that).