It's a lifetime appointment, so if nobody can prove you're dead… although if she had SS detail they'd know their protectee hasn't needed protection for a suspiciously long time…
Since several lines of redacted text appear in document fields about threat assessments, Justices Ruth Bader Ginsburg and Sonia Sotomayor might have faced threats on trips to New York and Massachusetts for which they did request marshals’ protection, the group said.
And details about protection of Justice Antonin Scalia during his fateful hunting trip to western Texas in February 2016 when he died show marshals were unaware of his potential failing health at the time and were absent from the scene for hours after his death, according to the documents.
https://www.rollcall.com/news/policy/group-raises-concern-about-protecting-supreme-court-justices