Will the MPs vote obeying their oath, or party lines?

MPs are accountable to the people, not their respective parties. If an MP votes according to how his party demands of him, or if he votes in his own self-interest, for cabinet position and for financial rewards, Parliament will soon be filled with selfish, amphibious MPs. It will be filled with MPs who are not interested in the nation. MPs who neither believe, nor practice Rukun Negara.