This is precisely what the parent commenter doesn't understand. He thinks the job of a programmer is all about technical skills. In fact that is only a part of the job. You need to be able to write, speak, and communicate in fluent English to be effective. And most Indian nationals, Peruvians, Columbians, et al cannot rise to that level.

So considering Asian developers far outnumber American ones, maybe the real bottleneck is the insistence on including American developers.

Especially since American developers are unlikely to speak any other language, while their Asian counterparts can communicate extremely well in their primary language and do a more than decent job in communicating in English as well.