>>Someone earned it and decided to pass it on to someone else (heir(s)). They should not have the right to dispose of their earnings as they see fit?
His point is that "equal opportunity" is problematic if more and more of the available wealth is tied up and inherited. Orwell's seventh commandment has indeed become "all animals are equal, but some animals are more equal than others."
"... They ne'er cared for us
yet: suffer us to famish, and their store-houses
crammed with grain; make edicts for usury, to
support usurers; repeal daily any wholesome act
established against the rich, and provide more
piercing statutes daily, to chain up and restrain
the poor. If the wars eat us not up, they will; and
there's all the love they bear us."
-- Shakespeare: Coriolanus, Act 1, scene 1