A senior U.S. lawmaker says representatives of Elon Musk were granted “full access” to a U.S. Treasury payments system used to disperse trillions of dollars to Americans each year, and warned that Musk’s access to the system poses a “national security risk.” Sen. Ron Wyden, a Democratic senator from Oregon and ranking member of the Senate Finance Committee, said in a post on Bluesky on Saturday that sources told his office Treasury Secretary Scott Bessent gave Musk’s team, known as the Department of Government Efficiency, or DOGE, authorization to access the highly sensitive Treasury system on Friday. The authorization comes…