The situation in the column to which the reader is responding, the supervisor had valid reasons for terminating the employment of someone. That being the case, the expected performance would be that the supervisors appropriately respond to an employee who was not performing as he/she should.
Since the article dealt with the issue of termination, we can assume that either there had been attempts to address the poor performance of the employee with a model of progressive discipline or that the issue was so great as to justify proceeding directly to termination of employment.
The current performance is that the supervisor is failing to respond appropriately to the need to terminate an employee.
The difference is that the supervisor is not performing effectively and the employee who needs to be terminated remains an employee of the organization.