If you see what has progressed in Pakistan over the past 40 years, GB would win the race.More due to apathy and selfishness than a deliberate conspiracy to keep them backward.
They know the relatively small population wouldn't make an impact in the elections. So it's okay to keep the status quo in place like it was since 1949. Not much thought is given to them. Just like FATA. The same colonial laws were in place till 2015 that were there from the time of British.
Most of Pakistans penal code draws itself from British colonial rule.
What internal progressive lawmaking can Pakistani parliament incorporate from GB assembly?