Even in the family business, there should be limits. What if the family business becomesand empire worth >20% of a contries GDP - e.g. Samsung. It is absolutely not reasonable to pass this amount of wealth to children of the founder.
Samsung is a public company no? It's not family-owned as far as I can see.
Samsung is not a family business in the legal sense of the term: it has shareholders and is thus nominally accountable to the public.