Why is downsizing and an employee’s role no longer being cost effective for the business not considered “cause” for firing?
There could be other conditions too depending on whatever employment agreement exists, but the point is to determine if an employee’s lack of performance caused their employment to be terminated or something external to the employee caused their employment to be terminated.
You meant i.e. or e.g.?
Under performance may be considered termination for cause in your state. It is not generally.