Why INDIA unable to use IT to that much extent eventhough having many no. of IT profession

I agree with what Rahul said, that is absolutely true. Political hindrance is the only factor for the growth of IT sector and the country too. And another reason is no proper utilization of IT professionals.     

It is the Indian Techies. - in the US & Western Europe - who help develop IT Products, which is very essential for high volumes of revenues & market dominance, but the same Techies. don't do the same while with Indian firms; reason, I believe, should be the short-sightedness of the Indian Corporates, rather than the laxity of their Techies, who are always game for innovation.

Indian Corporates, as I observe, are too happy to pursue the beaten path of selling products than investing into the development of the new products to gain market supremacy.

The reason for this unfortunate thing in India are many. Firstly, We don't have high infrastructure, work employment and opportunities which foreign companies can give. Secondly, due to high pay, our engineers are preferring to work there. They are also frustated of the extreme competition and 24X7 politics in the organisation which they don't find in other countries. Other countries recognise their talents and give justice to them. Because of this brain drain occurs and we cannot develop in that field where we are mostly expertised in.