Earlier quoted context omitted.
Errrr how? [Edit] Legally how is it. Not just because it's commonly measured in months of wages
It's not the way it is calculated. All payments attached to employment contract are wages, be it regular salary, bonuses, vacation pay or severance. Say the contract defines severance of 1 month for each full year worked capped at 3 months: at the moment contract reaches 1 year anniversary, the employee should be owed 1 month worth of severance upon contract termination
Are you European? Maybe it's different there.