[delecti]

I don't think their comment was arguing that at all, and in fact it seems like an indefensibly uncharitable interpretation.

> ultimately taken from the people and maintained via favourable tax laws

Taken from the people and maintained via favorable tax laws. UK inheritance tax is 40% (over the threshold, which is so low as to be meaningless next to the royal estate). With 5 royal deaths since Victoria, Charles III would have less than 8% of what he actually does if that 40% were taken each time (which is obviously vastly oversimplifying to make a point).