Yes, but Switzerland is a special case in general. Even post-docs (research assistants) at academic institutions have near six-figure salaries (CHF 85K, in quite theoretic field). A lot of non-hype tech companies provide six-figure salaries for engineers. I can't imagine any non-junior engineer to relocate to Zurich for anything below that.

Facebook average inc. bonuses £210K In London last year:

http://www.thisismoney.co.uk/money/markets/article-3268356/F...

In London, Google was paying GBP 70-80K, same for Skype/Microsoft.

That seems low for London since it's also a city with high living costs... Do they give any other extra benefits, or what about bonus/stock?

Surely there is a big range of salary from intern -> managing director? Does "the mean" matter in this discussion?

That was for experienced engineers.

I think you must be referring to base pay, not bonus or equity, which is a very large part of total compensation.