The waiver system has been used to defend the massive increase but by its nature that system is restrictive. It will not apply in many cases where families are on low incomes or if there are a number of units in a household. The waiver system will not apply in those cases and the authorities will be sceptical about exercising their power to grant waivers, as it will have a negative effect on the money that will accrue. People may not receive a waiver from some local authorities.