I feel buying high quality foreign-made items, with honest pricing that affords a decent wage to the foreign factory workers or craftspeople, is an example of how global trade should work. This sort of back-and-forth improves everyone's lot. When you buy a good quality Taiwanese knife, and pay good money for it, you are evening the playing field with domestic production. Some of the top tier Spydercos rival Chris Reeve knives, BOTH in quality and PRICE. That puts things in the realm of "may the best man win", which is a fair competition. It is only when you buy disposable shite from Asia, for 1/100 of the price it should cost, that you are doing a disservice to your countrymen.
The fly in the ointment is whether you believe that the people working at the foreign shop are treated ethically. Knowing a bit about the history of Spyderco, I would assume there is no sweat-shop, child labour, or slavery involved. Those situations do not tend to produce high quality products anyway.