That's a very good question. The answer to it is related to the dynamics of a workplace, whether it's small or large. Large workplaces have specialized help in human resources, they're always recruiting, they're hiring at all times, and there are people leaving at all times. In a business with say 500 employees, there's always going to be a churn of several dozen or many, many employees year to year. A smaller firm, say, with only five employees, doesn't have nearly that kind of turnover.
On November 23rd, 2009. See this statement in context.