But even then there was slum in Islamabad near Sitara Market.
Are you talking about french colony? That was the only one, and there was a huge debate, the problem is, if they had gotten rid of that colony at that time, there would have been no one left to do all the 'poor' jobs, cleaning the gutters etc! Im not a 100% sure but I heard they grazed it off and a huge building stands over tehre now.