During a debate last week over two Democratic proposals for a health-care bill featuring a "public option"—a government-run alternative to private health insurance—the senator announced he opposed the idea because, as he put it, "Government is not a fair competitor. . . . It's a predator."

The word "predator" seems to have become something of a Republican talking point. Mr. Grassley's colleague from South Dakota, John Thune, went on the record in July to warn that, when government goes into business, it "becomes not a competitor but a predator."

Have these two august men of the right secretly become fans of Mr. Galbraith, one of our leading liberal economists?

If so, they need to go back over "The Predator State" a second time. Although they have snapped up Mr. Galbraith's catchy title, they have misunderstood his message.

What makes government predatory, Mr. Grassley seems to believe, is its public-mindedness. Were government to offer health insurance to everybody without the industry's many devices for excluding risky individuals, some seem to fear, it might be able to offer consumers a price too fair for the profit-minded sector to match.

This is a curious reversal for a movement that ordinarily celebrates Darwinian struggle and the destruction of the weak by the strong. Just think of the conservative caricatures that must be inverted for this argument to work: All those soft liberal bureaucrats? Ferocious man-eaters. The welfare state? Law of the jungle.

And the actuarial-minded hardliners of the insurance biz, the ones who deny your claim or cancel your policy? A gentle but endangered species that needs our nurturing, sort of like panda bears.