Prime Minister Najib Abdul Razak should take responsibility for the government’s U-turn on the Integrated Manasik Monitoring System (Imams), which was scrapped just a day after its launch, says constitutional law expert Abdul Aziz Bari.

Abdul Aziz said it was wrong for Najib to disown the problem which had "embarrassed his administration."

"As the prime minister, he has to take the responsibility even though he may not know or did not have a part in it. This is the essence of the parliamentary system of government.