By John S. McClenahen Between 30% and 40% of workers are just going through their daily routines; their real focus is on where their next jobs will be, suggest the results of two recent studies. The U.S. economy is one reason there are so many unhappy workers, contend Roger E. Herman and Joyce L. Gioia, strategic business futurists at the Herman Group, Greensboro, N.C. "With the economic slowdown, opportunities to move [from one job to another] have been limited. Many workers feel trapped and just want to escape," they explain. "Another reason for employee dissatisfaction is the way they are treated by management," says Herman and Gioia. "Strong leadership can send positive messages about caring to employees. Unfortunately, too many employers lack strong leaders, so employees don't feel valued."