If bad Karma gets a bad reward, why do we still act badly?

The following is an excerpt from a samvaad (dialogue) session with Acharya Prashant.

Questioner (Q): Sir, you have said that “The right action is its own reward; the wrong action is its own punishment.” Basis your quote, the common man must choose the right action and be naturally aversive to the wrong action but that does not happen. Kindly, throw some light on…