It's very likely, according to a new survey, that your most talented employees are not happy. What's worse, they're eying other jobs. While it may not be a direct result of what HR is doing, it's a sign that employers should be reevaluating their human capital management.

Aflac's new survey released last week found half of employees are considering a job change. Stress, poor company reputation and no motivation to stay are among the reasons why workers feel compelled to walk. Benefits packages are also a great indicator of satisfaction, as workers who like their benefits are nine times more likely to stay with their employer.

This is a critical topic for human resources. Like most HR directives, talent management and human capital correlates directly to business strategy and budget. It's estimated that losing a middle-level employee could cost an employer 150 percent of salary, and as much as 400 percent of an executive's salary. And a recent survey on turnover found the average cost to fill one position comes in at more than $10,000. (By the way, if you're looking for a great bedtime read, check out SHRM's new cost-per-hire standard.)