There's option to opt out of social security if you are of the right religion that existed before, I want to say, by the 1960s was the nominal date in the statute -- and registered as such by some gatekeepers in the religion. The Amish won't let those who didn't grow up in the community register although some Mennonites might. Or are working as a preacher.

It should probably be challenged because it's a clear religious discrimination. I looked seriously at renouncing my right to social security but eventually I found out they've gamed the system in favor of a few insular religions.

They absolutely should!