As you say, that's global manufacturing in the 21st century, but ultimately, WGAF? The factories will build them in the most cost-advantageous place to themselves.
Not really anything to do with dirt-floor tin-bashing and it's incredibly dangerous working practices though. I see nothing praise-worthy with those poor unfortunates or the (usually scrap quality) parts they turn out.
That's the paradox of India though...they have a space programme and nuclear weapons but over half of the populace have never used a flush bog..