Very interesting study with quite a few take-aways, as well as limitations.
I always wonder how environmental factors fit in with this. I think many folks going through a divorce are surprised to find how incredibly materialistic their ex becomes once papers are filed... or how the word "divorce" doesn't come up until you finally land that big promotion, 6 figure salary, or career- out of no where she's "gonna live her best life", on your dime, of course.

https://www.psypost.org/gold-digging-is-strongly-linked-to-psychopathy-and-dark-personality-traits-study-finds/