Not necessarily.  There aren't that many employees any more who have less than 5 years on the payroll.  Because we have a defined benefit plan, under Federal law, an employee is vested in the plan at 5 years (actually, I think in reality it is 6 because the first year doesn't count).  Even if you furlough or fire that employee after they are vested, they will always be eligible for a pension once they reach retirement age.  It may not be much, but they will always be eligible to draw whatever pension they earned before leaving.