Loophole that allows people in worked in UK for 4 years to get state pension

Hi there - I am looking for comment on these stories

https://www.afr.com/wealth/personal-finance/a-480-000-opportunity-for-australians-who-did-a-stint-in-london-20250314-p5ljqg

and https://www.ft.com/content/f3be2234-b8d0-4c8c-8636-4b61b0e81bcc

It does seem most UK residemts have to work for 30 plus years and we are paying for a triple lock that this can happen.