Times have changed now and so have the people and rules, according to the necessities of the people and time. Even the municipal corporation feels that it cannot meet all the expectations of the people. The water and power needs of the people have also gone up. The Commissioners of many municipalities, throughout the country, now hire private contractors to get the garbage collected and processed. The nature of this kind of hiring of private contractors is called sub-contracting. Since the workload has increased it has become necessary to hire the services of private companies. The workers employed by them are either on daily wages or are on lesser payment.