Contrary to myth, medieval Europe was a font of innovation: water- and wind-powered mills, clocks, eyeglasses, chimneys and thewheelbarrow, as well as advances in shipbuilding, compassmaking and ironmongery (making wagon axles sturdier).
It depicts Liberal Chancellor of the Exchequer David Lloyd George (1863 - 1945) pushing the Budget wheelbarrow into the scaffolding of Capital and Employment, eliciting the cry 'Look out there, or you'll have the whole blooming show down!'