You can just look at what Social Security says about this [0]. TL;DR:
- Baby boomers getting old
- Economic conditions (you can see this in the data [1], where there's a suspicious huge leap in claims right around Trump monkeying around w/ the economy)
- Absent/inadequate health care
More directly, this doesn't seem to have anything to do with culture. The average disability application age is ~50 [2]. If this were a cultural issue you'd see that number declining.
> Maybe they just believe that parents should be responsible rather than the state.
What policy are you advocating here? So far all you've talked about is the non-existent freeloader problem.
[0]: https://www.ssa.gov/policy/docs/briefing-papers/bp2019-01.ht...
[1]: https://www.ssa.gov/oact/STATS/dibStat.html
[2]: https://www.ssa.gov/policy/docs/statcomps/di_asr/2023/sect03...