No, see there you go again.
They are not "ripping off" anyone. That is false. If it were true, people wouldn't buy health insurance.
They are not making money at the expense of anyone. Not anymore than say Brittany Spears or Keith Olbermann. See, this is called "capitalism." It means that people can make as much money as they are able to.
They are providing a valuable service to people. Thus they get paid well for it. Like anyone in computers, entertainment, etc etc.
People buy health insurance because they are FORCED to buy health insurance or face the prospect of going bankrupt if something should happen to them.
And they are often forced to choose between a limited number of monopolistic corporations, that fix prices, and screw them when they actually get sick.
Peoplel can live without a computer, or entertainment, but they cannot live without health insurance without the fear of losing eveything they own at any given moment.