The National Insurance system works on precisely the same principle as any commercial insurance company. If people star claiming before they have paid any premiums, then it won’t take long for financial difficulties to arise.
https://www.gov.uk/government/publications/migrants-detected-crossing-the-english-channel-in-small-boats/migrants-detected-crossing-the-english-channel-in-small-boats-last-7-days
6:59
4:26
3:12
5:46
4:15
5:10
4:24