In addition, two contemporary forces converged to spur congressional  year-in, year-out budget deficits that had to be brought down and a public now demanding not only that federal agencies do their jobs more effectively, but that they do so with fewer people and at lower cost.
Budget deficits were not spurred by any forced. 
mnli hypothesis: Budget deficits were not spurred by any forced.  premise: In addition, two contemporary forces converged to spur congressional  year-in, year-out budget deficits that had to be brought down and a public now demanding not only that federal agencies do their jobs more effectively, but that they do so with fewer people and at lower cost.