I was assuming that "merit" inherited from parents is undeserved, but yeah, perhaps that's unjustified. Do you have an argument that it is deserved?
Unless someone has broken the law in their process of accumulating resources, they are legally in possession of such resources.
I'm not disputing legality. There are plenty of unjust but valid laws that uphold a non-meritocratic society.
And there go the goalposts.
We're not talking about legality, we're talking about deserved merit. And as you yourself have shown, one cannot really independently judge merit, as it always comes down to who is actually judging it. Making the idea of a meritocracy not really feasible.