North Korea can't produce enough food to feed itself. As a matter of fact, they are probably net importers of just about everything from wheat and potatoes to weapons-grade plutonium. So what do they have to export, other than commando hit teams and failed ideology?
That's right, the Socialist Worker's Paradise of North Korea is apparently engaged in shipping "contract laborers" to the Gangsta's Paradise of Putin's Russia (and let's not kid ourselves about whose Russia it is: Putin's hand is so far up Medvedev's ass that Dmitri can't blink unless Vlad waggles his fingers; I haven't seen ventriloquism that bad since my fifth grade talent show,) where they toil in Siberian forests for their country's supper.
Yellow slavery. Wow. Boy, if that doesn't make you want to put on your Che shirt and wave your Little Red Book around, I don't know what would.