There has been many passionate arguments in favor of, and against, capitalism by economist and social scientist. I am neither economist and social scientist to comment with an authority on the subject. But fact remains that Capitalism is the most dominant economist and social system around.
Merriam-Webster Online Dictionary defines capitalism as “an economic system characterized by private or corporate ownership of capital goods, by investments that are determined by private decision, and by prices, production, and the distribution of goods that are determined mainly by competition in a free market”
Karma Siddhanta based itself on action, action inspired by purpose but with results being governed by natural laws of causation. What Karma Siddhanta drive towards is not inaction, as it is made out to be at times. Action is a duty to yourself, and to the world; not something which you abstain from. Inspired action goes well with the driving force of private ownership and natural laws of causation goes with the free market forces. How free is actually the free market? I think it is not a cause of concern as market is balancing itself to excessive control in the long run, notwithstanding apparent aberrations localized in time and space