Fee-for-service insurance had its growth spurt during the years of U.S. involvement in World War 11, when wage and price controls were imposed to divert money for the war effort. Although the government did not allow companies to raise wages to compete for the lean pool of workers still present on the home front, it did permit the invention of fringe benefits packages. Companies began to offer health insurance packages for workers and their families as well as other nonwage benefits.