Brazil’s government weighed pushing for a management overhaul at miner Vale SA on Monday as grief over hundreds feared killed by a dam burst turned into anger, with prosecutors, politicians and victims’ families calling for punishment. By Monday, firefighters in the state of Minas Gerais had confirmed 65 people killed by Friday’s disaster, in which a burst tailings dam sent a torrent of sludge into the miner’s offices and the town of Brumadinho.