Lots of people with 3 or 4 children made these children with a partner that they assumed would be contributing to their upkeep. Many relationships break down for a number of reasons and as the article highlights, women are disproportionately affected as they then have to reduce their working hours and/or pay for childcare leaving little to nothing over at the end of the month to put in their pension pot. Meanwhile, the man is still working full time and still paying handsomely into his pension fund. The gender pension gap is obscene.
But all a matter of choices and consequences.
You know what the say about assumptions...
If it's known that many relationships break down, and it is known, why not more aggressively protect oneself from the start.?? I've no sympathy for people who fail to plan and then complain about the inevitable outcomes.