So you expect the same politicians who are involved to solve the problem? You can only "de-politicize" the police by getting a non-political (neutral) force involved.
My understanding is that for the sake of country and democracy, the same politicians who we paint as bad all the time, should be pursued to do the job, by THE PEOPLE.. its in their own interest as well, since these thug warriors are somewhat out of control as well, have placed their own designs as well, if Shebaz sharif did this, despite direct clash with his own party's interest, it should and can be done in Karachi as well... a bit of media blackout required as well.
bringing army is politicizing and corrupting it, and putting it in with direct clash with certain political parties, previously it failed and all they have is bad blood between them now, secondly it serves army's own motives,
on a different option, we can get assistance from some other country's force as well for operation. say Saudi arbia or Brazil or Turkey, while intelligence agency provide eyes, they do the job...
and above all it requires sincerity to do the operation across the board.. when Babar did, he didnt even spare PPP militants...he got the free hand...
There are few illegal katchi abadis in Karachi...i' am pretty damn sure if a sincere operation is launched against these katchi abadis Karachi issue will vanish as if it never existed before. The thing is a person who is sincere & knows the ground reality of Karachi should be given the task of establishing peace, law & order in Karachi not ganwars fake degree holders from nooras.
this is a propaganda too that only a person who knows Karachi can do the right operation..anyone can acquire information about Karachi and its dynamics within weeks to do the operation. it only requires will and honesty. and yes you are right about slums and the immigrants, its a problem created by IDPs from FATA, direct economic clash with the karachites, hence the tussle.