Potato - there is money and there is money. Wanting money because you are freezing cold and don't have anything to eat is totally different from wanting money because you want to buy a Landrover with pink rims.
Surely no normally loving parent wants to see a child go hungry or cold?
I'm not saying that the issue is one of entitlement. I don't think the OP is entitled to the money by some legal right. I think there may be a bit of a moral right, however, and I also think it sounds like there is a kind of blindness that can care only for one child's family and not the other's.
Seeing it from the other side, I suspect that a child's early death does terrible things to a parent, and that they may be trying to 'compensate' for the tragedy by thinking only of their grandchildren on that side, to the neglect of their other daughter. Sometimes a horrible logic can set in, as well, where the child who dies becomes a perfect angel, reinforcing a scapegoating dynamic to the survivor.
To speak personally for a second, in the hope of defusing this horrible dynamic on the thread where the OP is being accused of being grabby. I have plenty and want for nothing. It still galls me that my parents spend £££ on my sister and absolutely nothing on me. It's not that I want or need the money - I'd refuse it if it were offered. I want to be loved and cared for equally, to be acknowledged and recognised as the equal of my sibling. I want my pain to be see as equivalent to hers. I want them to care that I had to pull food out of bins at one point, while they kept my sister in luxury. I want them to care that I was cold, while my sister was fine. I want them to spend even a tenth of the time on and with me that they spend on her. I want not to have been through years of abuse and neglect, while she's not experienced that.
There's always some unhelpful soul who says "Yes, but it taught you endurance and strength and independence". It's not the same as growing up in an ordinary way and becoming independent healthily. It also led to years and years of counselling to combat the feelings of low self-worth and rejection. It's not healthy for a family to be completely on-sided. It's not right.