Karma, like god, is a creation of the amazing human brain. THerefore, it can be anything humans can think up. For some of us 'purists', and I don't mean 'better than' by that, we simply hold up Karma as a guide to help us do good.
"WE" use this concept to show us that doing good will create more good. It's basis in reality is the strength of the Karma idea, please don't bring the esoteric ethereal erroneous ideas to Karma or we will lose it'spurpose and benefits.
"You" can do whatever you feel is best with this idea, but please consider that KArma is an idea and not something "out there" for us to investigate or whatever.