My question to you would be, why would we pay foster carers, social workers, admin fees, legal fees, placement fees etc etc at a huge expense when we could pay a smaller amount to help that family stay together with support for the parents to ensure that money is spent appropriately and meets the child's needs?
Because the evidence is abundant that for the subset of people I was referring to - who are easy to identify if children's services are competent and properly funded - have never and will never meet their children's needs even if you give them more money. This is manifestly clear.
And, because the children's needs should be prioritised and - as I said - they can have comparable outcomes to those raised by competent parents if removed and care is funded properly. They have no realistic prospect of reaching the average outcome if left with such families, whether they are given more money or not.
The idea we must give neglectful, useless, selfish and even abusive parents more money in order to protect children is wrong. This would not protect a large proportion of the children living in poverty at all because the reasons for poverty in such cases are not caused by lack of money: the lack of money is a symptom arising for the underlying causes which make it inappropriate for a child to be left in the care of such people. Irresponsible, selfish, stupid, incapable or even deliberately neglectful or abusive so-called-parents. Children are not experiments. They should not be left there to see what happens. Minimum standards of care (much, MUCH higher than now) should be set and children removed immediately if they are not. Put the presumption on the side of the child, not the parent.
It would not be difficult for a competent children's services to distinguish between those who had simply fallen on hard financial times and those who are incompetent and irresponsible and should not have any child in their care because there is clear evidence in those cases of the parent making irresponsible/ neglectful choices quite aside from their financial situation (although often such choices will also have resulted in them having little money as well).