Wrong answer - Medicare.
See, when your primary consumer is the government, you're going to just end up getting more and more expensive stuff, because there's nobody asking for cheaper solutions. Sure, they may be trying to cut costs, but there's nobody really clamoring for cheaper. They're just going to try to bargain for whatever the industry serves up as "the best," which also happens to be the most expensive, cutting edge version of whatever they sell. This is, in fact, the reason that medical technology in general is getting more expensive, while all other consumer goods are getting cheaper. Need more proof? Look at televisions. You can always spend thousands of dollars on a television - you've always been able to, in fact, even when that three thousand dollar TV was a 720p 32-inch flatscreen. Now, the three thousand dollar TV is, I don't know, a 60" LCD with 3D. But you can also always spend a few hundred bucks and get a pretty decent TV. And that few hundred bucks is always buying you a better and better TV. That's because there's *demand* for the less-than-cutting-edge products. When there isn't that demand, all you'll get are the cutting-edge products, which will be more and more expensive.
This is what you get when you're regulated out of beign able to provide surely less effective, but more economical choices. I can already hear the nerf-world argument: "But this is *medical* stuff, and lives are on the line, so we always want the best, cutting edge technology!' Sure, and as long as you cling to that argument, please don't complain about ever-increasing health care costs, or blame the eeevil corporations for (gasp!) giving you exactly what you're asking for.