Must say I find the term ‘child poverty’ troublesome - how can it possibly be separated from ‘parent poverty’?
The problem in many cases, I’m sure, is that even if parents work full time, they can’t earn enough to enable a reasonable standard of living. Especially in the SE, where the cost of housing has soared in recent years.
Of course the issue is exacerbated for single parents, but the basic problem IMO is so often our low wage economy.
If parents are unable to work, or choose not to, that is of course an entirely different matter.
Of course if childcare were made genuinely affordable, as it is in some other European countries, I dare say a good many parents (mostly women) whose pay would not even cover the cost of childcare, let alone provide any extra, would be only too willing to return to work.