I don't see much daylight between neglecting (apathy towards) family and vengeance or spite.
Whatever the case, I'd welcome research into attitudes towards eldercare. Right now, I feel like we're flying blind. For instance, I wouldn't be surprised whatsoever if GenX'ers (like me) would rather die than be warehoused. But no one I know is thinking that far ahead, having these discussions with their kids. Nor are our parents discussing this with us, now that it's our turn to be the care givers.
--
For instance:
Family Involvement in Residential Long-Term Care: A Synthesis and Critical Review [2008]
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2247412/
"... These collective findings have helped debunk the myth that families abandon their relatives in nursing homes or similar settings to die in isolation..."