I have no objection to inherited wealth to families, except that those family members all too often end up with skewed values which they are all too happy to impose on the rest of us via the excessive power granted by that same accumulated wealth.
I'll ask the question another way: why does the child of Sam Walton deserve to live a fabulously rich life orders of magnitude wealthier than someone who spends their life plumbing toilets, and much worse, why are they allowed to use their wealth to hurt other people?
What does "deserving" have anything to do with it? That's entirely subjective. If Sam gave his wealth to a plumber, the plumber wouldn't have been any more "deserving". If he gave it to a hospital, the hospital wouldn't be any more "deserving". No one "deserves" wealth.
Because they have now a disproportionate amount of power, compared to the average citizen, to influence the lives of all of us, to hurt other people, to purchase power and influence to enrich themselves further to the detriment of others. That is not a fair arrangement.