Fortunes diluted by too many heirs are largely squandered in a generation or two. If that weren’t the case, I’d likely have been born into wealth myself. I was not, but do have a few ancestors who were wealthy in the extreme by the standards of their day. All I got was a certain grudging acceptance into certain social settings as genteel po’ lol.
Primogeniture laws were unfair but often kept inherited wealth intact. If an estate falls below a certain level of critical mass, it’s much more easily lost entirely due to poor decisions, war or other conditions beyond ones control.
That way you keep whatever advantage keeping it in the family gives, plus you keep the money out of the hands of the government AND the far leftwing extremist foundation management class.
Expanding inheritance to the 500 closest blood relatives should take care of a number of social problems right off the bat.
BTW, I'd still be very wealthy if I had my share of FifthThird Bank ~ it's an immense fortune and a relatively small number of heirs.
Then there's the Hughes Tool Foundation.
Jus' gimme' my stuff ~ take it away from the leftists.