Dear Hari,
In short
All labour is also employee,
But all employees are not labour.
There are three steps:
Labour: Operator, Worker, Grade W-1 onwards, Welder, Fitter etc.
Supervisor:Supervisor, Foreman, Accountant, Cashier, Engineer, Grade E- 1 onwards etc.
Manager: Manager, Asst. Manager, Deputy Manager, General Manager etc.
All are employees.
Labour doing physical job, under some supervisor cadre.
Supervisor follows the instructions of manager.
Manager follows the instructions of Management or OWNER.
I feel this may give you some clarity.
Regards,
AK Mathur