The whole second paragraph makes it clear that you don't understand the complexities of the Healthcare industry. You provide very broad brush statements like "allow insurance competition across state lines", the complexities of that single issue alone are staggering. Are you aware that the strength of most in-state insurance carriers is their in-state network. An insurance company IS it's network. In addition each individual state has a Department of Insurance which also regulates all carriers in that state. DOI rules and regulations vary from state to state. Expanding your coverage to another state is a very complex undertaking.
Also, Individual groups do have the ability to purchase healthcare - see many professional organizations(AIGA, etc) as working examples of this today.
In either case, making those changes won't just magically open the industry to "the web and to innovative, competitive forces". There are already competitive forces at play. Any new player attempting to join the fray faces an uphill battle just in the regulatory aspects of the business alone.
What do the advantages of the web and new technologies bring to insurance? How do these changes the provider networks which are the backbone of major insurance coverage today? These are the types of questions which need to be posed, and the people in the best position to answer these questions and change the game are insurers themselves. There are many smart and talented people working in insurance. The recent proposed Healthcare changes have helped to begin the process of moving forward and thinking differently, but with an industry like this it will take time.
It is happening, insurance providers are looking at new technologies and ways to provide the coverage that people expect, for lower costs, in new and different ways.