Twenty-four percent of middle-class Americans are increasingly unhappy professionally, and 39 percent of middle-class Americans are looking for new jobs, according to the First Command Financial Behaviors Index.

Professionally unhappy respondents represent a jump from 21 percent in 2010 and 11 percent in 2009, and new job seekers have grown from 29 percent in 2010.

"This rising discontent in the middle-class workforce is clearly being fueled by the continuing economic turmoil," says Scott Spiker, CEO of First Command Financial Services Inc. "Americans were significantly more satisfied with their jobs in 2009 when many people believed that the recession would soon come to a close. The persistent economic downturn has taken a toll on middle-class Americans, with many people feeling that they are being asked to work more and are making less. So it makes sense that consumers are starting to look for more appealing alternatives to their current circumstances."