Block management is big business which has a lot of responsibilities in certain neighbourhoods. They can be involved in everything from building work in communal areas, to the day-to-day management of those areas.
Block management agencies primarily act as middlemen for the residents in their area and other services, including potentially things like waste management, engineer services, even security. They have the expertise and more importantly the contacts that people need to get a good deal.
In managed blocks, managing the waste can be a tricky task, but it is important for everybody in the community that it remains clean and tidy. Any exposed waste can be bad for health and well-being, as well as have serious impact on the value of the properties themselves.
While you may feel that having the council manage the issue is good enough, a waste management service can be done far more regularly and when it is needed, as opposed to the very rare visit by council cleaning services.