Houston, we have a problem--just as machines have displaced bank tellers, ticket-takers, and capital markets traders, they will soon rush through the economy taking jobs away from a growing population. These machines do not purchase items required to live, so their growing presence reduces the "multplier" effect previously experienced during the growth spurt from 1945 to around 1989. So, we need to change radically they ways in which Americans learn and we had better start soon. The kind of change required will prove impossible unless we break public sector unions and change tenure as well as other work rules.