24th richest with $11B spread across 174 surviving heirs doesn't seem all that rich to me. That averages out to about $60M/heir, which is about what you get for selling a medium-sized technology company with cofounders & investors, or a relatively small one you own yourself, or owning 0.01% of Facebook or Google (roughly first 50-100 employees, if my equity experience with other startups is any guide).
$60M, invested well, will last several generations. Hell, if you aren't too lavish, you can retire on less than $5M and still pass financial independence to a (single) heir.
As a sibling poster said, that's a pretty sweet deal in exchange for... nothing aside from the luck of being born to the right family.
