In our day, there is a distinct lack of concern for future repercussions. I imagine a lot of people do not really believe in Karma, or more simply, a reason to do the right thing. They cannot see what is around the corner nor what will come to their Souls when this life ends.
If you are one of those who doubts that Karma is real, ask yourself these questions as well:
Is the World still flat? Until explorers sailed around the Earth, it was believed for thousands of years that the World was flat. Now that so many have travelled around the globe, there is no doubt, the Earth is definitely round.
Is Gravity real? Drop your coffee on the floor and you will see, gravity is definitely real. You cannot see it with your eyes, but its force is measureable on every planet.
Is Electromagnetism real? Only about 150 years ago there was speculation as to whether electricity was a natural force that can be harnessed and used. Now we have no place to go where electromagnetic power is absent. Almost everyone has a gadget.
Karma is a natural force that works like Quantum Physics. You do not have to own and operate a spectrum analyzer to experience its effects. When you have built up enough of a certain kind of potential energy by your actions, you will automatically leave an Energetic imprint on the Universe.
When your life is over, you will see and feel this as more real than you can imagine right now. Try to do the right thing, moment by moment, in every situation, just in case.