>70% is a pretty insane number that certainly speaks for itself.
Also, when you start giving a lot of tech jobs to people from one specific country, then the github developer numbers will naturally reflect that.
It is easy to make the 'cheap' argument when you talk about outsourcing but it no longer makes sense when you look at h1b numbers.
Local salaries might even be slightly lower, because you get to hold h1bs prisoner (an added benefit.)
No it doesn't, not materially anyway. Stats can be misleading if you don't pay attention. A lot of the big corps started hiring H1-B in large numbers long ago but since H1-Bs can't easily switch jobs and tend to suck up to higher-ups, soon their mid-management was occupied by H1-Bs.
Anybody who has tried to find a job in such an environment knows the drill - Indian managers hire only Indians and prefer H1-Bs to keep them docile. Salary isn't a consideration there, but it all starts with "cheap" and is sustained by ethnic loyalty and fear of the outsider.
In smaller companies where hiring is more natural, H1-Bs are still payed less and their inability to switch jobs makes them cheaper still.
Same bias happened when manufacturing moved to China. However, no whining on HN since at the time, blue-collar American red-necks were getting their just deserts.