Are these losses economic losses?

Case background:

Plaintiff's lost their parents in a plane crash due to a airplane defect. The parents had a very large estate and as a result the estate taxes that the children had to pay when the deceased parent's assets were transferred to them amounted to several million dollars.

It is argued by the children's attorneys that had the parents not died the parents would have transferred the estates to the children over time and in a more tax advantageous way. According to the children the parents were in the process of doing that at the time they died.

Should the childern's estate tax bill be considered a loss in the economic damage calculation in the airplane products liability lawsuit?