We're paying about 17% of our GDP. The problem isn't merely insurance company profit, but also the expenses of the insurance company. A huge percentage of the people involved in the health care industry have nothing to do with actually providing health care--insurance executives, insurance company employees, medical billing specialists, company benefits plan managers, health insurance brokers, etc.
In contrast, other nations are spending far less as a percentage of GDP (and in absolute dollars) but have 100% coverage, zero medical bankruptcies, a more contented populace that isn't horrified by the prospect of job loss, and businesses and economies that aren't burdened by health care concerns.
If you haven't seen it, you should watch the documentary,
Sick Around the World. This article is also good reading:
Health Care Costs and Reform
While other nations are advancing, our nation is becoming a third world throwback.