Kevin Williamson‘s latest column for National Review Online considers the results of recent choices made with the best intentions.

News item: There is a new cholesterol-control drug on the market, Repatha, which is enormously beneficial to people who suffer serious side effects from the statins commonly used to control cholesterol or who derive no benefit from statins. Some 17 million Britons are potential beneficiaries of the drug, but they will not be able to use it, because the United Kingdom’s version of Sarah Palin’s death panel — which bears the pleasingly Orwellian name NICE, the National Institute for Health and Care Excellence — says it is too expensive. The United Kingdom’s single-payer health-care system is effectively a monopoly, and not an especially effective one: Cardiovascular-disease mortality rates in the United Kingdom are nearly 40 percent higher than in the United States. That’s not nice. And it isn’t what was supposed to happen.

News item: Between raising its in-house minimum wage to $9 an hour and increasing its spending on training, Walmart took on an extra $1 billion in expenses and subsequently failed to meet its earnings expectations. As the back-to-school rush gives way to the buildup to Christmas, Walmart employees around the country are seeing their hours trimmed as the company tries to recoup some of the losses it imposed on itself. Employees say they are being sent home early from their shifts or told to take extra-long unpaid lunch breaks, and they say that individual stores have been ordered to cuts hundreds or even thousands of man-hours. That’s not what was supposed to happen. …

… The news repeats itself until the bits that lodge in our brains like splinters become history, which also repeats itself. But neither the repetitious news nor repetitious history endures quite so immovably as our gift for shielding our brains against learning from either of them.

Politicians tell us what a policy is supposed to do, what it is intended to do, and they ask to be judged by their intentions. The so-called Affordable Care Act, we were assured, was intended to make health insurance a better value and to make health-care institutions give their customers better service at better prices. Never mind the unspoken premise that is the law’s foundation — “We can radically increase demand for health-care services while reducing costs and improving quality because politicians are magic!” — and its inescapable contradictions. “We meant well,” they say, and that is supposed to be enough.

It isn’t.