Why a new airport?

A news report was published in The Daily Star on August 28, 2010 about the government's intention of building a new airport and naming it after Bangabandhu. This is a huge project that requires Tk. 50,000 crore plus.
Spending this huge amount of money for building a new airport doesn't make any sense in a country like Bangladesh, where majority of the people are poverty-stricken. The following things can be done instead of building a new airport:
--To accommodate more flights and handle passengers, the present terminal building can be expanded all the way to the north up to Uttara and towards the south up to Nikunja. The cargo terminal and the hangers for maintaining the aircrafts can be relocated on the western side of the airport and the VVIP terminal can be built near Nikunja.
-- A part of Dhaka Cantonment on the western side of the airport is open for public, the government can easily make new terminal buildings, roads and a second runway there. A new road will be required from Zia Colony intersection to the Ashulia-Uttara Berribandh point as the entry and exit routes to the airport.
In the subcontinent, all the major airports are located inside the city. We can simply go to Mumbai and take a close look at the airport and can decide. This huge amount of money can be utilised by making the required 27% roads in Dhaka city. Making flyovers on the outskirts of Dhaka at all entry/exists points as well as within the city to combat traffic jams should get preference. New power generation units can be built to save the general people from the present power crisis. And many schools, colleges and universities can also be built with the money left after renovating the present airport. We need to spend money in a planned way and for that we have a planning ministry who are supposed to guide the government.
I would request our PM and the authorities concerned to give it a thought before this huge amount of money is spent.