The scene reminded some South Koreans of an ongoing scandal that led to the resignation of Justice Minister Cho Kuk.
Cho resigned in December and is being prosecuted for falsifying documents regarding family investments and efforts to gain university admissions for his children. He has denied wrongdoing.
The scandal struck a chord in South Korea where young people, who compete furiously through school and university, are increasingly finding themselves scrambling for a dwindling number of positions in a slack job market, in a system they see as plagued by systemic unfairness and biased in favour of the elite.
The issue was a particular disappointment to the young people who supported Moon and his party when he became president on a platform of cleaning out corruption in the government and business.