The two-year “Cadillac tax” delay under consideration by Congress is the worst kind of special-interest legislation. It will enrich labor unions and big business at the expense of taxpayers. ObamaCare’s Cadillac tax is a clunky but constructive first step in reforming the employer tax exclusion. It has problems—its structure as an excise tax is punitive, and it contains carveouts for favored Democratic constituencies—but the basic idea of equalizing the tax treatment of employer- and individually-purchased health insurance is a good one.