Mr. Summers offers various caveats along with his prediction of a mass-casualty legislative event. But he largely accepts the Congressional Budget Office’s guess that 13 million more people will choose not to enroll in government health plans if insurance is no longer required (Summers rounds the guess down to 10 million), and he basically credits his former colleague Kate Baicker’s research suggesting people are more likely to die if they are not enrolled in a health insurance plan.

Mr. Summers is not alone among ObamaCare defenders in wanting to persuade people that the number of people covered by government insurance is the true measure of health. But the vast expansion of such coverage engineered by his old boss doesn’t seem to have made Americans healthier.

. . .

The House and Senate recently passed tax reform bills because they successfully made the case that reform is a “once-in-a-generation” opportunity that is long overdue. It’s a compelling argument. When the last tax reform bill passed in 1986 the Internet was in its infancy and cell phones were the size of a briefcase. The world has changed, the argument goes, but our tax code has not.

What’s curious, however, is that the largest deduction in the tax code – the exclusion from income tax of employer-sponsored insurance, which dates back to the 1940s – is untouched by the reform bills. This omission is an enormous missed opportunity for American consumers and both political parties.

. . .

Congressional repeal of Obamacare’s individual insurance mandate penalty is not tantamount to pressing the button on the doomsday machine.

Critics of the Senate tax bill say repeal of the mandate penalty to buy Obamacare coverage will result in a spike in premiums, an increase in the numbers of the uninsured, and a “collapse” of the health insurance markets. In other words, the individual mandate is the “glue” that holds Obamacare together.

The assumption: Millions of Americans will buy Obamacare coverage—regardless of whether they want it or like it—because the government forces them to do it, and penalizes them if they do not.

Do we have compelling evidence that this is, in fact, the case? No.

. . .