https://www.nejm.org/doi/full/10.1056/NEJMsa2408259
Amid growing wealth disparity, we have little information on how health among older Americans compares with that among older Europeans across the distribution of wealth.
newspaper article in German: https://www.derstandard.de/story/3000000265478/mehr-geld-h246here-lebenserwartung
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More intelligent people on average have a longer life expectancy:
And more intelligent people are also probably on average likely to be wealthier, so it would make sense to presume that on average wealthier individuals would have a longer life expectancy than poorer individuals would.
However, this wouldn't necessarily apply to groups (as in, to between-group comparisons):