The next big growth engine could and should, if the Congress were to choose to emprace it, be a large infrastructure and public works budget (especially given the current low interest rate environment, and the large number of people unemployed and underemployed). Our bridges and highways and air traffic control system could really use it. Of course, keeping the waste, fraud, and abuse in that budget down to a minimum would be difficult, given current Congresspeople and their priorities and agendas.