Corruption bad
"Half of all living former South Korean presidents are now in prison. On October 5, 2018, former president Lee Myung-bak was sentenced to 15 years for embezzling 24.6 billion won (roughly $22 million). Lee will join his successor, disgraced ex-president Park Geun-hye, who last year began her 25-year sentence for various charges of corruption. Lee and Park’s lengthy prison sentences may seem striking for an established democracy. But the reality is these sentences are not anomalies; rather, they reveal how tenuous South Korea’s hold on democracy really is."
https://www.aei.org/foreign-and-defense-policy/asia/south-koreas-troubling-history-of-jailing-ex-presidents/