I grew up in a family of six dcs where our f kept breeding because he got more family allowance. We were nothing more than a revenue stream, and there are plenty of men who see children that way. We went without while he had handmade suits.
I'd pay child benefit in vouchers, for school uniform, for shoes, for food to stop that happening again. I'd refinance SureStart centres and provide free school meals.
I'd offer free childcare for the under 11s to any mum attending college or working full time. There has to be a viable way for women to gain skills and escape poverty because it is women who lead their children out of poverty.