Forget about watches and chocolate. Switzerland is one the three most industrialized countries in the world. That is, the industrial output per person is one of the highest (if not highest at some moment). Not services, but real things produced. Maybe this is what makes them quite a strong economy. Surely, their culture adds a bit to that.

Is it scalable? I'm not sure if this is the properly framed question. It implies that other nations are not predestined to be like Switzerland. I think the more appropriate question is: what policies should we implement to be like Switzerland?