Wheelchair-bound from 1990 when a deranged gunman’s bullets crippled and almost killed him, Wolfgang Schaeuble’s instinct for survival also permeated his professional life as one of Germany’s longest serving politicians. Schaeuble, who has died aged 81, devoted much of his career to reunifying his country and, as Angela Merkel’s loyal, frugal finance minister – a role he took on after seeing her end his ambitions of becoming chancellor – helped secure its place at the heart of Europe.