People outside TN, that is 95% of Indians dont know what happens in TamilNadu. The present State Government has a well known policy to neglect the districts, espically the Southern districts. All investment and development happens only in Chennai and around it. Southern TN people always reject the DMK in elections. So in order to fool them, the Sethu project is promoted - it is promoted as a scheme to make Tuticorin the next singapore.
Better that people outside TN realise it first. A small canal cannot do any big change, because Indian Shipping industry is a small kid and insignificantly small in world.
What we need is not Sethu Canal, but a canal to link all Indian Rivers