there's noting to lose it's just a way of thinking and nobody know what the first who conceived it what his purpose was. it's just our interpretation we're living in a difrend time, you can only say what you think about it thats phisophy my opinion. 

in ancient times it was ussed for moralizing inequality. in political view 

karma is not really a Buddhism vision ist's from Hinduism and that is a real religion.

Its coplacaited matter because the poeple that take that as religion  thinken in a soort of hierarchical thermes  for exampel they believe dat poor poeple are born poor because they did somthing wrong in the life before. I think its not a good way of thinking because its a simple way for saying to poeple that hasn't sutch a good life that it is there own fold.