Is North Korea to Become South Korea's Mexico?

I found an interesting line in this (http://www.nytimes.com/2007/11/15/world/asia/15korea.html) New York Times article detailing proposed cooperations between the two Korean governments. Part of the plans would include South Korea "build[ing] special economic zones so it can relocate some of its labor-intensive industries there." At first glance, one might see this as an attempt on the South's part to make the North an area to provide cheap labor to it's companies. Also in the article, however, we read that "South Korea hopes to improve roads and railways in North Korea." I read this and hope it means that as unification looms on the horizon, the South is already planning ahead to fix the infrastructure of a country 50 years behind.