Kim Dae-jung’s Son Wants A Return of the Sunshine Policy

Can someone please explain to me what the success of the Sunshine Policy was that warrants it to be reimplemented?:

To mediate two volatile partners ― Washington and Pyongyang ― Kim called for Seoul to revisit the 20-year-old Sunshine Policy. “Some people blast the policy, saying it’s only devoted to showering North Korea with rice. However, the essence of the Sunshine Policy is constantly making efforts to take the helm in shaping the nation’s future.

“Given the characteristics of the incumbent U.S. administration, Seoul should be more proactive in addressing its needs. For example, the U.S. has urged its allies to maximize pressure toward Pyongyang while it’s maintaining unofficial contact with the North.”

He cited former President George Bush’s message of peace at the Dorasan train station near the inter-Korean border in 2002 as fruit from the Sunshine Policy. Only a month after the hawkish president blasted North Korea by calling it the “axis of evil,” the older Kim successfully persuaded his U.S. counterpart to promise to talk with North Korea.  [Korea Times]

You can read more at the link, but a return to the Sunshine Policy means is that the Kim regime will arm themselves with nuclear weapons and ICBMs quicker.