Why don’t you agree with the cap? Are you happy to fund all these children? Because I’m not, if you can’t afford it don’t have kids.
Let's ignore for a second that a large percentage of benefit claimants are in work and paying taxes and their benefit payments are a top up because minimum wage has not kept pace with the cost of living and unstable contracts (e.g., zero hours) mean work doesn't always pay.
Child-related benefits are only payable while the parent has a qualifying child in their household so they are only paid for a finite time period, even if they had child after child after child (which they don't/won't as not many people have 4+ children). At the end of that finite time period, the money stops because it was for the benefit of the children. It is there to put food in their bellies, keep a roof over their heads, clothe them, make sure that at the very least they have the basics so that they're going to school fed, dressed, clean, and in good health to help give them the opportunity to succeed and do well. Children who succeed and do well then have the chance to escape the poverty trap and find jobs where they dont need benefit top ups.
Remove the benefits, cap them, cut them, and the children suffer. Nond of them asked to be born, they should not be held accountable for their parents choices and austerity does nothing to cut the birth rate.
I want my taxes to go towards helping vulnerable people in our society, to go towards giving everyone a leg up to help them get on in life rather than funding a punitive system that drags them down and keeps them down.