As the 2012 Farm Bill enters its second day of deliberations on the Senate floor, there is a new splinter on the dairy front. Senator Robert Casey (D-Pennsylvania) has proposed an alternative plan to the National Milk Producers Federation (NMPF) Dairy Security Act (DSA). The DSA, of course, has margin insurance provisions and a controversial supply management provision that can be triggered by increased milk production. Casey's plan is even more interventionist, with the following provisions:

Pricing formula based on national cost of production, Import restrictions, and Supply management provision to be triggered under certain production levels.

While the Casey plan is a fringe proposal, the DSA is not. There is indeed substantia...