Speaking to people in medical companies the going rate is a MINIMUM of 2000% profit on much of the stuff. Look back at none invasion testers, been shown working accurately 15 years a go. Doing final testing due to release in 2006. Bought up by the big companies and shelved.
Have a look at one of the early 1984 Medtronic pumps. Give or take a few tweaks here and there we are using pretty much the same kit these days. Ok screen, wireless things, and software improvements over time. But realistically very little. And how much do these things cost? I've made my own (prototype) pump using better components for under £40 by just buying them retail off component companies.
Oh it's a research that costs. Bull! To quote Novo when they announced they were going to open a new research lab in Seattle costing them $60mil to research new insulins...unfortunately getting the wrong person on stage :P but effectively saying they hadn't done any insulin research in the last 10 years and were only going to now to bring together all the things learned from various university's around the world into a product. So no real research themselves other than product development.
Look at artificial pancreas' (well pumps with new software) being demonstrated. Lets double to number of drugs and infusion sets, oh lets add two sensors for more accuracy. More the consumables the better!
Look at the implant systems. All need to be installed by professionals and only last a short period of time.
Test strips are a joke. It's taken government rule changes and the likes of Walmart producing there own to see any kind of slight move from the companies in that. Not huge moves sadly, but some movement.
A cure isn't profitable. No medical company is interested in it no matter what they claim. Making a device that has a nice consumable market is the way to go, thereby they do. In the richer nations we are being milked by the companies for being the cash cows we are, be that the insurance companies doing the paying, ourselves, or the state run funding. In many countries though the costs of these things are so prohibitive that it makes being diabetic a slow death sentence, and frankly I find the companies doing it utterly abhorrent.
There needs to be a new way of funding these things, there needs to be a reason to cure and not to profit out of other peoples suffering!