You've come a long way and caused a lot of carnage. But ultimately you got things done, and it's up to others to pick up the shovel and continue the crusade against this horrible corruption.
You take the keys out of the ignition and step out into the sunlight. Police swarm you and take you into custody. You're found guilty and sent to jail, at least until the next president is voted in and pardons you...
...But you will be back, in "Excavator Vigilante II: Excavator Vigilante vs the Ancient Patriot Foundation," when you are once again called upon to level your shovel upon Gwanghwamun Plaza, when a statue of Park Chung-hee is erected.