"During the ongoing regular session, we will push for a law revision that bans the presidential appointment of deputy prime ministers for the economy and social affairs when a confirmation hearing report is not adopted at a relevant parliamentary committee," Kim Sung-tae, the floor leader of the LKP, told reporters.

Kim Kwan-young, the floor leader of the BP, gave a similar view.

"I think that the law revision could gain public support, given the gravity that the deputy prime minister posts have," Kim said at a meeting with party officials.

An appointment of a new minister does not require parliamentary endorsement, though the National Assembly can express its objection to the nomination by rejecting the adoption of a confirmation hearing report.

Key posts, including supreme court chief justice and prime minister, require parliamentary approval after a confirmation hearing is held. (Yonhap)