You've realised that living in Switzerland doesn't seem so great any more. After you retire, you do what you have always wanted to do and emigrate. Not a problem when it comes to your pension – we'll send it out to you.
You're enjoying life as a pensioner somewhere in the world. How nice for you. All we need in order for you to receive your well-earned pension is your address and the details of the account you want us to pay it into. This way, you will continue to receive your money, although we should point out that we are required to deduct withholding tax in most cases.