Corruption leads to different kind of crimes than mugging on streets and visible violence. It has led to chaebols avoiding taxes, police getting brided, cases like Burning Sun, Sewol tragedy, the recent sex cam and blackmail case..
South Korea has been democracy just couple decades. It used to have dictator and oppressive regime not so long ago. Western countries were even supporting that regime since it led to financial growth and strong opponent against communist North Korea.
The current goverment of Moon Jae in has promised to root out corruption, but its roots are planted deep. And are the goverment even above corruption themselves?