IF I understand correctly, if I was to retire at say age 53 I would have to pay AHV contributions until 63 when I could then receive the pension. These contributions are based on wealth. But these also are counted towards your contributing years.
As an immigrant to CH in mid-30s, I definitely wont accumulate the full 44 working years, but it is interesting if I do retire early then the AHV contributions would contribute to the associated working years. I presume the years when you contribute post-fire count as a low salary, but when estimating your salary band they average your entire earnings. And since the ceiling is about 90K, then this averaging can work in my favor.
E.g., I currently probably have 12 years working in CH with 7 on a salary 120-200+ K, I plan to work 10 more years before FIRE giving only 22 working years. But then i contribute AHV for another 10 years, I would be at level 32 and probably the max pension for 32 years of contributions