Actually, Senator Ben Cardin, right here in the great state of Maryland, has introduced a bill to do just that, but it's going nowhere. As I understand it, his bill goes had after big Pharma as one of the culprits for criminally high health insurance costs.
As for the risk corridors, it was the Democrats who came up with the idea, so I think they'd want to fund it.
There are three big ways to cut cost in the world of healthcare and insurance:
1. Cut administrative costs. This is the advantage of single payer. Medicare/medicaid have less overhead costs associated with them than insurance providers. Fewer administrative costs means more money actually going to care and not overhead costs. Remarkably, the government is actually
more efficient than the private sector when it comes to health care. Imagine that.
2. Improve maintenance of care. More frequent "maintenance" care is less costly than emergency care, but it's cost-prohibitive for the poor, who are also more likely to need care. Improve access, spend less money.
3. Get everybody on insurance. When everybody is on insurance, the cost goes down because healthy people pay into it. Does it suck for the healthy people? Sure it does, but everybody needs healthcare and and it's the best way of balancing the moral need for universal coverage and the costs associated with it. We're all required to have car insurance. Most renters are required to have renter's insurance. Why doesn't the GOP want to require health insurance?