It’s a given that, once in place, a national ID would be used for additional purposes.

In case you needed proof, on Wednesday, Senator David Vitter (R‑LA) offered an amendment to H.R. 627, the Credit Cardholders’ Bill of Rights Act of 2009, requiring the Federal Reserve to impose federal identification standards on the opening of new credit accounts. Among the limited forms of ID credit issuers could accept are REAL ID cards, produced under the moribund national ID law. (Vitter may not realize that REAL ID is in collapse.)

To compound things, his amendment would require credit issuers to run new credit card applicants past terrorist watch-lists. The sense of normalcy, efficiency, and common sense that makes airports so pleasurable to visit today would infect our financial services system. Oh joy.