Why have loads of kids if you live in poverty? That's a massive parenting issue. I've somehow managed to not get pregnant again after two.
As for 'What is the advantage of keeping kids in poverty?' Why do parents waste what money they do get on stuff that doesn't benefit their kids? Here's a PS5! 😭 I can't afford to send him a packed lunch in 😭 Priorities.
Take away the amount spent on takeaways, alcohol, drugs, unnecessary stuff, I'm proof that, in my area, as a parent of two kids, i had plenty. Never had a penny from their dad as he left the area when we broke up and he quit his job, got someone else pregnant and the benefit life started there (and continued there!). There's another way to 'keep kids from poverty', make the damn dad pay up.
It can never be as black and white as to whether the cap should stay or go, Good parents will always spend sensibly, the rogue ones will always want more and waste more. Rogue ones having big families because they get paid to have kids, results in more people who grow up work shy because benefits give them the easy life. Look are civilisation now, people are always complaining how more rude others are, selfish, entitled, vandals.... That's what you get more of. The wiser, more responsible ones will keep child numbers low so they're able to give them the best of everything.