This document discusses how social networks can facilitate corruption through a process called "network subversion". It analyzes how multiple social networks in South Korea, based on geography, family, and education, may increase the likelihood of bribery by providing more opportunities for favors and influence. The study tests whether individuals with participation in more networks self-report higher rates of bribery involvement. Bribery is found to be a widespread problem in South Korea according to surveys. The document argues that networks of acquaintances, rather than just closed criminal groups, can enable corruption through relational ties and favors across overlapping networks.