Just did some basic PV calculations - not sure if this is correct:

If you want to retire at 40 and expect to live until you are 80, you need to have amassed a bit more than Fr.3m in your bank account in order to spend Fr.100,000 per year for the rest of your life.

If you want to retire at 50, about Fr.2.5m should do it...

Ouch. Start saving....