Steve Jobs; former associate at Apple.
Reference: https://apecsec.org/steve-jobs-liver-transplant-controversy/
I don't think the parent comment intended it to be funny, is sounds like a tongue in cheek criticism of an ethically suspect problem.
Plus, the extra joke of framing his "exploitation of the organ system's rules" as "pentesting", since "well, he found ways that a rich person could jump the queue...".
My earlier comment on this kind of "insight framed as a joke" (interestingly enough, also in the context of Apple): https://news.ycombinator.com/item?id=24506073
https://www.livescience.com/16551-steve-jobs-alternative-med...