[skrebbel]

Brain drain is really not an issue at all in Western Europe. Sure, some people move to SV, but the majority likes sane working hours, streets without poo, and schools without metal detectors at the entrance.

Anecdotally, the amount of European programmers I know that moved to the US slightly exceeds the amount of American programmers that moved to Europe. I strongly doubt a different visa system would impact that significantly.