So, the cheap stuff that you're getting is because someone is getting a super bad deal, by exploiting the heck out of workers. Same in China.
The garments factory owners are walking away with tonnes of money, leaving the workers high and dry.
The more _subtle_ point that the author is making, is that, "wait, if people realize that they can get awesome developers in developing nations for a lower price, I'm not going to get hired any more in my over-priced city".
Good, move to a place where your salary is worth more, and work to enrich that community. Why should SF and NY get all the benefits of economic growth?