Not a problem, I only worked in the UK for 5 years and will get a full pension for only paying 150 GBP a year in voluntary class 2 contributions.
They will give me 220 GBP a week 🙂
Only a problem if you live to 90, and the odds are well against most from doing that, and if you do, it's a bonus, and you'll have grandkids/great grandkids to look after you.