By Monica E. Oss One of the big debates in Washington these days is how much “competitive market forces” can be used to reduce health care costs (see Dr. Rand Paul Unveils Obamacare Replacement Act and House G.O.P. Leaders Outline Plan to Replace Obama Health Care Act). We’ve written before about how “consumerism” is a growing factor in the health care market due to consumers paying a higher proportion of the total health care bill in the U.S. – and plans with higher copayment and deductibles. The average annual deductible paid by single adults with employer-sponsored health insurance increased by 67% – from $646…