Most very wealthy individuals (not sure your examples fit this group) do not use Vanguard. They are more likely to use private wealth management. I feel like you actually have no idea what you are talking about?

So your conclusion is that very wealthy individuals do not own and control Vanguard--they have nothing to do with it at all--that it's collectively owned by the rabble--and all is well as we little people have everything in control via our company Vanguard (that we little people collectively own) and together we're heading into a bright shining new tomorrow? Definitely nothing sinister going on here involving big monied interests vacuuming up ownership of the entire economy through relentless consolidation.