The Wall Street Journal is starting the day with a provocative opinion editorial ($) by Benjamin Luxenberg, a Marine first lieutenant who says some troops should be willing to take a cut to pay and benefits in order to solve the nation’s fiscal crisis–and he’ll be the first to volunteer. Luxenberg argues that troop pay has become “sacrosanct” in the national dialogue, and crucial defense programs are facing deeper cuts because of that. “National security shouldn’t be sacrificed on the altar of military pay,” he writes. The statement comes with caveats: before wholescale cuts, Luxenberg says pay should be aligned across…