Melamed's main motivation, however. [fact]
Melamed's main motivation, however, was that a federal agency could "give that edict about cash settlement" (Melamed interview). The original 1974 charter of the Commodity Futures Trading Commission preempted the laws of individual states, so if it approved cash-settled futures contracts they would no longer conflict with state gambling laws (there was no federal prohibition on gambling).
Donald MacKenzie, An Engine, Not a Camera, loc. 762