I have little knowledge about facts concerning SSNs, but I recall having a SS card about the time I got my first job around age 14 or 15 or so. I thought SSNs were issued to babies when they're born; I guess I was wrong. RJ never having a SS card and never paying taxes, never voting, always reminded me of James W. Hall's Thorn character, who also lives off the grid. I should say Thorn reminds me of RJ, since RJ appeared on the scene a few years before Thorn, but I discovered RJ years after discovering Thorn.
The first character who had an extreme aversion to these types of Societal Institutions was probably Travis McGee. Trav's hatred of Credit Cards imprinted on my teenage mind so indelibly I've never used one. Debit card, yes, but no Credit Cards for me. And believe it or not I still use (GASP!)
cash on occassion.