There’s a reason it’s called “fuck you money” and the wealthy tech guys really lean into the “fuck you” part. They seem to think it’s fun. It’s also the mark of a sociopath!
https://en.wiktionary.org/wiki/fuck_you_money
I was unfamiliar with the second one, which is the one you give.
I was familiar only with the first one: the ability to leave your job, and burn your bridges behind you by swearing at your former co-workers. I think that's the older meaning; I found it in a 1970 book:
https://www.google.com/books/edition/The_Deceivers/XoxBAAAAI...
Other books from the 70s appear to have that sense.
Do you think he realizes he will be discarded?