This is nothing new, Japanese anime productions have been using Korean animators for decades. in fact, wasnt' the last decade plagued by a trend of reduced frame count in most anime produced as the anime studios tried cutting corners to reduce cost? Now with the trend of going digital, even the Korean animators might soon find themselves out of a job.
As for work being exported, hello developing countries, this is what you have to look forward to when your country joins the ranks of "developed nations".
I guess you can call that the effect of globalization.