How could you decide whether the mid-level management deserve over-time pay or not? In other words, explain employess levels that deserve that pay.

Mid Level or lower - not necessarily have to be paid overtime. their efforts could be paid off by either a bonus or an increment. Depends on the staff level and varies from employee to employee

The wages level positions only that are applicable to have overtime, any salary position not applicable.

It all depends on the fairness of the salary scale, and the job description of each level. But my own theory is: As a junior employee, having my salary is not enough encouragement to develop myself so usually i'll try joining places that offers (Decent Salary, Over time or Bonus). As a mid-level career/management my attention will go for a more attractive basic salary (Over time and bonus will not matter to me much as they are not fixed). As a higher management employee, i reached my goal in life, awesome salary and a more awesome title (this means Overtime and bonus will never think about).

No need to pay overtime for mid levele Management Employee

IT DEPENDS ON THE CONTRACT OF ANY EMPLOYEE, EVEN IF AN EMPLOYEE HOLDING MANAGEMENT POSITION WITH PROVISON OF PAID OT IN HIS CONTRACT , WE NEED TO PAY THEM, WE CANNOT DECIDE, EMPLOYEMENT CONTRACTS SPEAKS THEMSELF.

If target being met during overtime hours could have been met during normal hours, then clearly they are not being prudent with their normal working hours. However if proven with evidence that overtime hours are productively used and  resulting in targets being exceeded, then other  'motivational package'  could be arranged for middle management rather than OT allowance. This package could be based on results from internal evaluation of employee's needs and may differ from company to company.