Spyderco has knives made in several countries, so even though you buy only the American models you are still helping Spyderco's ability to produce knives in other countries.
If you really feel buying Moki is hurting our economy you may want to only buy from companies that keep 100% of their money in the US.
edit to add- I try to buy only US myself, but I do have 2 foreign made Syderco's. I have no problem finding high quality made modern designs made in the US, and thats what I buy in that area. But I also like many types of knives, a traditional lockback(no clip, no thumb stud/hole) being one of them, and I've gave up looking for a light/medium weight high quality production lockback made in the US. I like and buy the Case Copperlock, but it doesn't have the quality of Moki, and I've had to send a GEC #72 back recently because of blade play, overly stiff lock, and a different jigging pattern on the back scale from the front. I've also handled many other US brands at shows, and now feel if I want a very high quality producton tradional style lockback it won't be made in the US. I'm down to about 100 knives, and only about 6 or 7 of those are foreign made. None from China.