Eh. I hire developers overseas on the regular. Senior devs, or people who can pass for one, are making ~$30/USD/hour regardless of location if they have conversational level english skills. Yes, having skills I want as an employer is important. There's no free lunch.

Let's assume their fill rate is only 50% of their total time. That's still ~$32k USD / year. This is great money even in a developed country like Russia where the median income is ~$5k/USD/year.