The health insurance industry makes more money than the oil industry. It isn't a coincidence that most of our taxes go to healthcare and the top grossing industries are all built around it.
Oil business earns far more profit at far higher profit margins. Exxon alone earns more profit than all managed care organizations (health insurance companies) some years.
Revenue that is 95% paid to vendors and employees is not an interesting statistic, on a company level.
