Since Nawaz' party had an overwhelming majority in Parliament, the Fourteenth Amendment effectively prevented the Prime Minister from being dismissed by a no confidence vote.
A few months earlier, the Thirteenth Amendment took away the President's reserve power to remove a Prime Minister by dissolving Parliament and calling new elections.
In the past, this has contributed to a sense of immunity on the part of members of the ruling party, and to rampant corruption among leading politicians.
The Fourteenth Amendment increased this perception, and contributed to the overwhelming popular support for General Pervez Musharraf's coup in 1999.
The Supreme Court subsequently validated the coup on the grounds that the Thirteenth and Fourteenth amendments created a situation for which there was no constitutional remedy.