1. NRIs are investing in Bangalore real estate because it gives them maximum returns and not because they want to help India. 2. NRIs are not responsible for growth of India. India's growth is because of the IT boom created by Infosys, wipro, TCS, satyam and many MNCs. 3. NRIs are not returning to India because of their love to mother land. They are returning since a job in India with a salary of 2 to 3 lakhs per month gives better living standard than what they can get in US.
PS: I am not a government employee with 10,000 month salary. I am working in a MNC with very good salary and pay my taxes without taking any bribe ;-)