Obamacare Needs Healthy People and It's Better If They Are Not Young

I can't quite understand the persistence of the ageist nonsense about how the health care exchanges need young and healthy people to sign up for them to work. There is a real issue about adverse selection.

If the only people who sign up are unhealthy and therefore have high expenses, then insurers will have to raise their prices. This will make plans less attractive to all but the very sick, which will force further rises in prices, leading to a further narrowing of the market.

But the key is...