@SchoolQuestionnaire
When you give lower earners unlimited child benefit you are giving them an economic incentive to have more children.
Do you know what was happening before the two child cap?
The lower earners responded to the incentive by having even more children. Those children then also grew up in poverty, had worse educational outcomes, poorer health etc..
You simply cannot give incentives for people to have even more children when those parents cannot FULLY (not just the basics) provide for them until they become functioning adults. This is hugely expensive for society, and is also one of the reasons why we have such poor productivity.
The result of pre-cap was generational poverty where lower earners have 4 kids, and 3 kids stay in poverty while only 1 becomes productive. This effect then mushrooms out over the entire UK economy and you end up with masses of people with low skills doing low wage work.
The two child cap has to remain in place until the prospective parents become mature adults capable of fully parenting their chidren until they are functioning adults.
No more, no less. Thats why personal responsibility matters here.