Mauro Guillén is vice dean of the Wharton School at the University of Pennsylvania. He has just published in Spain The multigenerational revolution (Deusto) in which he encourages breaking the rules that govern society, work and the economy.

“We have a complete mismatch between the way the system asks us to live and the dynamics of technological change and increased life expectancy,” he says. ‘The idea that the great prize you have in life is retirement is absolutely harmful for the vast majority of retirees’