As per official records Karachi have enough water to be supplied to the whole city on alternative days .....
but no this system is not even implemented from decade .... I personally remember 2005 was the last year when we used to get regular supply of water in our area on alternative days.
Now coming to your point that I am deliberately misleading you about the situation of Karachi therefore I would advice you to counter check with other Karachites of the forum.
And YES Sindh Government is by design and systematically targeting the city but not with the purpose of changing the demography as it is NOT POSSIBLE FOR ANYONE, but with the intention of penalising the city for political differences.