A developer earning 1/5 of an American silicon valley salary in India is really good, they could easily replace you. The problem isn't them, the problem are the developers earning 1/20 of your salary in India, they are as crap as the bad developers in USA, and they are what most companies trying to get cheap headcount in India go for when they outsource to there.
Edit: The above numbers were 5 years ago, might be closer today, but still.
Edit: The above numbers were 5 years ago, might be closer today, but still.