Seoul is guided by its left-wing, appeasement-minded president, RohMooHyun, and the vested interests of roughly ten publicly traded South Korean firms led by Hyundai.
Washington should also put real pressure on South Korea's timid President RohMooHyun (thank goodness there's a presidential election there next year) to suspend all money transfers to the North, using the pretext of North Korea's provocative ballistic missile tests.