A new survey has found that as many as 20 percent of government workers plan to leave their current positions by the end of this year.

The CareerBuilder.com study, which surveyed 116 government workers 18 and older in the U.S. also found that nearly 18 percent are dissatisfied with their jobs, and 36 percent said better pay and/or career advancement would be a prime motivator for leaving.

Among the other findings:

Part of the dissatisfaction, according to the study, comes from the perception that workers are putting in longer hours without additional pay. More than half thought their workload is heavier than it was six months ago, with nearly a third saying their work/life balance was uneven.

The survey, "Job forecast 2007 -- Government," was conducted from Nov. 17 through Dec. 11. It was conducted online by Harris Interactive on behalf of CareerBuilder.com.