Raja Natwarlal (Emraan Hashmi) is a conman. He cons people into giving up their hard-earned dough by talking them into it. He does this invariably in the most obvious of ways possible. Which leads us to think that this movie is set in a universe solely populated by morons.
See, the issue here is not con films. We all like con films because we all like to imagine ourselves as being able to set aside the pesky side-effects of accelerated evolution that we gave ourselves - like morality and a conscience - and see how far we get without them.