Economic gap between East and West Pakistan in 1960s is often cited as a key reason for the secessionist movement led by Shaikh Mujib's Awami League and the creation of Bangladesh in 1971. This disparity has grown over the last 40 years, and the per capita income in Pakistan is now closer to 1.7 times Bangladesh's in 2011, slightly higher than 1.6 as it was in 1971.
Haq's Musings: Economic Disparity Between Bangladesh & Pakistan
Haq's Musings: Economic Disparity Between Bangladesh & Pakistan