It's such a transparent lie. Most families in the UK with three children are in poverty. The UK punishes the child for existing, by denying it social security.
The two child limit, and associated rape clause, is punitive. If we look at UK families with three or more children, two million of those kids are in poverty [1]. Scrapping the limit would cost a token amount, and lift 270 000 [2] children out of poverty.
[1] https://www.gov.uk/government/statistics/households-below-av... table 4_5db
[2] https://edm.parliament.uk/early-day-motion/61220/the-twochil...