(In Europe.) Aircraft fuel isn't taxed, but train 'fuel' (electric or diesel) is taxed. Airlines can base their staff in a cheap country and pay lower wages,

(In Europe.) Aircraft fuel isn't taxed, but train 'fuel' (electric or diesel) is taxed. Airlines can base their staff in a cheap country and pay lower wages, avoid unions etc. Local governments subsidise airports to attract tourists/business. The railway already exists and doesn't get this subsidy.