Can we imagine a country without talented engineers, scientists, doctors and other professionals?

This is exactly what is happening in India. Most of the talented professionals are running after dollars and pounds. Due to this, India faces shortage of people for high end industrial work based on research and development.
The investment the Indian Government makes for educating an individual goes waste, when people migrate. People work for improving the economy of foreign countries, rather than their own

Example
NASA is launching Satellites ,Space craft successfully,...but
Our ISRO's Geosynchronous Satellite Launch Vehicle (GSLV-F02) was unsuccessful..
Infact >30% NASA's employees are Indians.................