(Material View ) Karma is nothing more then the manifestation of ones guilt. If the person feels no guilt in their actions then the outcome of their actions are then governed by the principles of action equals reaction in which the reaction of ones actions can be intelligently manipulated towards the benefit of the individual regardless if their actions are negative or positive. Hence Karma really does not exist because the individual has the intelligence to control the outcome of their actions (through strategy) so long as they do not allow their guilt to manifest what they fear. It is by these principles in which the illuminated and the wicked get away with murder in this world. Which is why Karma was invented. To still the actions of the unrighteous. For those with a conscious are already governed and thus do not need the belief of Karma.
(Spiritual View )
On a spiritual level so called Karma takes on more of an effect that is much much harder to circumvent. By spiritual Karma I am talking about what an individual or even a society projects out with inner intent. Each thought or desire casts a ripple upon the ether. This is how magick works. The more emotion, desire, or intent the greater the wake. Thus materialistic strategies around this form of Karma are almost unheard of unless you believe the tug and pull of duality evens out your karma. Some magicians believe in Karma stones which are used to stop the ripple that ones uncontrolled mind has created. Though I must attest that such material mediums may give solace to ones mind but in actuality there is no stopping such a ripple. Even if you decide to do ten good deeds for every bad deed the bad deed is still forever there in effect. As so with ones thoughts. This is why it is imperative for any true spiritualist to learn how to control the mind as well as ones negative conditioning's from this life time. The more adept one becomes the greater the wake that follows. In the end such "Karma" or spiritual "tuning" is the building blocks to bridging us all together into one collective entity through the clashing of such waves (strong and weak forces) to form the ultimate democracy based on the principles of energy to form a collective consciousness or entity in which we all becomes tuned to one mind or ideal in which disagreements will cease to exist and thus we may ultimately fuel Gods consciousness with our collective creativity.