I honestly don't know. Is having one extra family member worth that much financial hardship? A million dollars can make quite a difference in the long term if invested effectively. Imagine not having to work day in, day out, just to stay alive, only to die eventually anyway. After all, our life is the only life we get, and we might as well do whatever we can to enjoy it as much as possible. How often is one presented with such an opportunity?
On the other hand, on contemplating death, it seems cruel to wish that upon someone else. I would not classify it as murder because it's indirect, but it's still malicious to a certain extent and it's willingly allowing someone to die. Cessation of consciousness is not something I would want anyone to go through, and certainly not because of a decision I made. It would feel as though the money I "earned" would be blood money and, having never known someone who has died, I have no idea how I could deal with that.
So I don't know. There are arguments on both sides, and pretending otherwise is dishonest.
I would ask where this guy got his assets, to me that seems more interesting.