The majority of the cuts over the last ten years have been to services and benefits aimed at children and young people - i.e Sure Start centres, child tax credits, educational maintenance allowance, cap on child benefit to two children.
The fact that these benefits even exist is evidence of the veneration of children and child-bearing in this country. The state is encouraging people to have children whether or not they can afford them on their earnings alone.
Young people under 24 cannot even claim housing benefit
Young people under 24 who'd be in a position to claim housing benefit are not, by any definition or stretch of the imagination "children". They're people who by virtue of attaining adulthood, are no longer venerated.
and we have millions of children growing up malnourished and in poverty
That's just one of the consequences of wealth inequality in this country. It has nothing to do with the cultural veneration of children. If the children are malnourished and impoverished, aside from cases of individual neglect and abuse, the parents will be too.
A lot of this is due to the individualistic, materialistic and selfish attitude which seems to predominate in the UK which is that children are a “lifestyle choice” rather than as valued members of society and literally the future population!
If we were suffering from an underpopulation problem, this would be a valid point. But we are suffering from the opposite. It is a choice to have children - it might be underpinned by biological urges, but it's essentially a selfish decision (as are most lifestyle choices - I am not criticising childbearing in particular).