This has been one of my personal soapboxes for years. Wealth attracts wealth, and the more you have, the easier it becomes to accumulate even more. It’s a feedback loop.
A functioning society is all about proper incentives. People with good ideas should be able to work their way into wealth; I don’t think anyone disputes that. There’s also value in letting people leave some of their wealth to their descendants. But it should cap out at a few million at most: enough to live a modest and comfortable life, but not enough to build a dynasty around. The rest should go towards raising living standards for everyone and incentivizing the next generation of good ideas.