Dabbawallas

The Dabbawallahs of Mumbai are being studied as a business model and will be considered by students of the Harvard business school. I mentioned to you that Mumbai's float of the Dabbawallahs was one of my favourites at the Republic Day parade - well it looks as if they are quite a remarkable and noteworthy business phenomenon.
One question that concerns me is surely when you are delivering lunch to as many as 200,000 businessmen at lunch time every day arent you exponentially adding to the traffic and the chaos and the congestion and wouldnt it be simpler and more globe friendly if everyone grabbed a sandwich from their local shop around the corner, not only supporting local business but even expending a few calories in having to go and get it ?