In recent times, in order to save money, the Commissioners of several municipalities across the country had hired private contractors to collect and process garbage. This is called Sub-Contracting. This means that the work that was earlier being done by government workers is now being done by a private company.
These contract workers get paid less and their jobs are temporary and casual.
Collecting garbage is also quite a dangerous job and often these contract workers do not have any access to safety measures.
They are not taken care of if they are injured while working.