Comment by mirajshah

Yep, also I think the barriers to entry for the insurance market are extremely high. Not only is there a huge fixed cost of actually negotiating rates with every individual doctor/hospital, there's also the fixed cost of getting individual employers to consider you for their business. These and some other factors leave the insurance market with just a few insurance providers, who can let prices run away and simply charge higher premiums/deductibles without fear of competition from a "start-up" insurance provider.