WASHINGTON

How can we learn to say no?

The federal government is now starting to build the institutions that will try to reduce the soaring growth of health care costs. There will be a group to compare the effectiveness of different treatments, a so-called Medicare innovation center and a Medicare oversight board that can set payment rates.

But all these groups will face the same basic problem. Deep down, Americans tend to believe that more care is better care. We recoil from efforts to restrict care.

Managed care became loathed in the 1990s. The recent recommendation to reduce breast cancer screening set off a firestorm. On a personal level, anyone who has made a decision about his or her own care knows the nagging worry that comes from not choosing the most aggressive treatment.

This try-anything-and-everything instinct is ingrained in our culture, and it has some big benefits. But it also has big downsides, including the side effects and risks that come with unnecessary treatment. Consider that a recent study found that 15,000 people were projected to die eventually from the radiation they received from CT scans given in just a single year — and that there was “significant overuse” of such scans.