Those of us who voted Labour with pleasure on 4 July could never have imagined the new government’s first 100 days. We thought that the grown-ups would take charge after the chaos of the Tory years. Labour would be the adults in the room, as the cliché goes: sensible, professional people like Sir Keir Starmer, a former Director of Public Prosecutions, and Rachel Reeves, a former analyst at the Bank of England.