According to Wendell Potter, a former health-insurance company lobbyist, “the new law props up the employer-based system that insurers and large corporations benefit from so greatly. It also guarantees that private insurers will get billions of dollars in new revenue.”[1] It is no accident that Obama’s health-insurance law works out this way. Potter points out that Republicans will back off from repealing the mandate, but will push for other changes. The reason is that the mandate is in the health-insurers’ interest whereas some other features of the law are not. Private insurance companies would like to keep the mandate that will guarantee them more customers. At the same time, the insurers would like to go back to refusing to cover kids with preexisting conditions, canceling policyholders’ coverage when they get sick, and setting annual and lifetime limits on how much the insurers have to pay for medical care. Also, the insurance companies do not like having to spend eighty percent of their revenue from premiums on medical care, and the insurers would like to get more from the US government for private medicare plans.
The full essay is at "Congress and Health Insurance Companies."