Are you sure that Pakistan's system of bonded service is capitalism? Perhaps we have different definitions. I checked wiki, dictionary.com and there's no mention of slavery, usury.
Okay. I think I better understand what you're saying.
Reading the wikipedia entry on capitalism was a nice refresher. I am not an economist, so interpret as you wish: These farmers are not wage laborers. So capitalism doesn't apply. (Doubly so for sharecroppers, bonded labor, slaves. Obviously.)
My suggestion is in specific response to the observation that a financial fix would be impractical. I agree. So my proposal is to leverage Pakistan's Muslim cultural heritage. Jubilee's are part of the Abrahamic tradition, spanning Judaism, Christianity, and Islam. So maybe it'd find more traction where capitalism has not.
India has been slowly moving away from the license raj, and turning more capitalist little by little.