Employee Monitoring

I understand why a business would want to check on an employee's phone calls or emails if they suspected them of wrong doing. Other than that, why would a company spend money for someone to sift through someone else's business? It's almost if they're looking for something, trying to create problems. As long as their employee is getting their job done, not harassing anyone, who cares if every once in a while they make a personal phone call on company time? I'm sure their not costing the company as much as the people who sit at a computer all day looking and listening to what other people do.

Fact Sheet 7. Workplace Privacy
Employee Monitoring: Is There Privacy in the Workplace?
http://www.privacyrights.org/fs/fs7-work.htm