https://en.wikipedia.org/wiki/National_Flood_Insurance_Progr...
https://en.wikipedia.org/wiki/Medicare_(United_States)
https://en.wikipedia.org/wiki/Medicaid
It's a free as anything gets (in that it's kinda hard to distinguish from a tax), and universal (or was when I moved out of the UK): https://en.wikipedia.org/wiki/National_Insurance
https://en.wikipedia.org/wiki/National_Flood_Insurance_Progr...
https://en.wikipedia.org/wiki/Medicare_(United_States)
https://en.wikipedia.org/wiki/Medicaid