That's been one of the supposed consequences of the 80/20 rule that Obamacare introduced, although I can't find any numbers, just speculation that insurers are

That's been one of the supposed consequences of the 80/20 rule that Obamacare introduced, although I can't find any numbers, just speculation that insurers are doing it. The 80/20 rule says that the insurance companies must spend at least 80% of their revenue on actual health care, or else they have to return money to the insured. So if you're a healthcare company and your stockholders want to see increases in profit, the only way is to spend more money whether it's necessary or not. You can't make more by increasing efficiency. Searching for this gives articles about how the insurance companies actually have returned a fair bit of money, and none with hard numbers about this actually driving healthcare costs up, But there could be a lot of reasons other than "it hasn't driven costs up" for why it's not showing up in a quick search.