I sympathise with those seeing their jobs offshored and outsourced, but I suspect traditional union organisation isn't going to win the case against.
The answer, I think, is to build one's own abilities - not purely technical ones - that are generally not available from an offshore provider. It could be using you proximity to the customer to better understand their requirements. It might be the ability to concisely outline a problem or proposition in both technical and business language. It might be the ability to work with colleagues across language and cultural divides.
Of course I might be wrong, and 2016 will see me living as an off-grid ukulele luthier.