Why no Pakistan Prime Minister has ever completed a full term

Pakistan is witnessing political turmoil again in connection with an arrest order against its former Prime Minister Imran Khan.

Over 10,000 armed Punjab police personnel launched a major operation at Imran Khan's residence in Lahore to attend the hearing in the Toshakhana case and arrested dozens of workers of his party after the former Pakistan prime minister left for Islamabad to appear before a court hearing a corruption case against him.

The drama in Pakistan leaves many wondering why no Prime Minister in Pakistan since its birth in 1947 has completed their full term. The underlining part of the story is that 18 of them was been ousted due to a variety of reasons that include corruption charges, military interferences and infighting within the ruling groups.

Also, one Prime Minister was assassinated. The 10 others have served either as caretakers to oversee elections or managing the government following the dismissal of a government.

Interestingly, Pakistan had five PMs in 1993.

Who was the longest-serving PM in Pakistan?
Yousaf Raza Gilani of PPP had the longest consecutive term of 4 years and 86 days.

Yousaf Raza Gilani of PPP had the longest consecutive term of 4 years and 86 days. At approximately 9 years and 215 days in total, Nawaz Sharif of PML (N) has been the longest-serving PM for a non-consecutive term. Whereas the shortest term was 13 days by Nurul Amin. And Mian Muhammad Nawaz Sharif occupied the PM post three times: 1990, 1997 and 2013 and it is the most for a single candidate.

List of Prime Ministers of Pakistan