Here again, however, there is a deeper answer. It is possible for economies to suffer from an overall inadequacy of demand--recessions do happen. However, such slumps are essentially monetary--they come about because people try in the aggregate to hold more cash than there actually is in circulation. (That insight is the essence of Keynesian economics.) And they can usually be cured by issuing more money--full stop, end of story. An overall excess of production capacity (compared to what?) has nothing at all to do with it.