> What does other openings have to do with "world network for dodging taxes"?

Marketing.

> Several consultancies will happily open a "paper company" for you in Ireland or wherever you choose. No problem whatsoever

Not every company is willing to spend this much on marketing.

> "Talent goes to Mountain View" [citation needed]

Read up on the story of Lars Bak.

> There are a lot of talent outside the US (V8 came from Germany, also Zurich, London and Dublin offices have technical openings, Australia, not to forget Belo Horizonte in Brazil) and inside the US (NY comes to mind)

Openings that have been "open" for many years. If you get through you will be moved to Mountain View, CA.