Subsidised water in Delhi - Do you think free water leads to abused water use?

Kejriwal keeps his promises on power tariff, free water in Delhi, I just read this news in newspaper. I am concern over the water use. Tariffs for water is made so that people consume water wisely. If there is free water do you think there will be abused water use? I know that it is a benefit for poor communities, but do poor communities really have legal water supply? I feel the model should be based on your income and how you use water per head.

What is experts opinion on this subject?