Jan Crouch, who has died aged 78, co-founded, with her husband Paul, the Trinity Broadcast Network, the world’s largest Christian broadcasting empire. The Crouches founded TBN in 1973. Based on the “Prosperity Gospel” – the promise that if people make sacrifices (and donations) God will reward them with material wealth – it beams Christian-inspired programming to every continent but Antarctica, 24 hours a day, seven days a week.