They are immature. They believe that they can take the Indian voters for a ride for ever. They can commit all the crimes and still hope to be elected again and again. There is no alternative. When everyone is corrupt, the voter has no choice.
Indian voter is far more mature.
He has thrown out the mightiest of the mighties. He has thrown out once mighty Indira Gandhi. When the Janata party misbehaved, it was also thrown out. The politician never learnt that the people have come out of their slumber. He kept on misbehaving.