These are feudals. They thrive on keeping the poor poor, while making themselves rich.
While these families exist, they will always use their wealth to hinder the rise of the ordinary man. It suits their agenda and of the masters they serve to keep Pakistan backward.
Let me tell a true story and I'm sorry I can't remember the exact names of the two people involved.
Someone once asked a jagirdar, why do you not allow people to be educated and progress? The jagirdar says: "I am going shooting tomorrow morning, come with me and I will show you why". So they went shooting by the side of a lake. It was a cold, winter morning and the jagirdar was accompanied by a group of his serfs. A bird flew past, the jagirdar shot it and it fell into the lake. As soon as it fell in, the serfs jumped into the freezing water and retrieved the bird for their master. The jagirdar turned round to his friend and said "did you see that? Who would do that for me if I allowed these people to become educated?"
I believe that is a true story, and even if it wasn't it would be a great metaphor for how these families think of common people.