The primary task of fundamental research is to discover, of research and development is to optimise, and of industry to produce, and one of the main … - Vikram Sarabhai

So the real problem in this whole question relates to utilization of national resources for productive and social welfare against the burden of defense expenditure which a country can bear at any particular time.

There are some who question the relevance of space activities in a developing nation. To us, there is no ambiguity of purpose. We do not have the fantasy of competing with the economically advanced nations in the exploration of the Moon or the planets or manned space-flight. But we are convinced that if we are to play a meaningful role nationally, and in the community of nations, we must be second to none in the application of advanced technologies to the real problems of man and society, which we find in our country. And we should note that the application of sophisticated technologies and methods of analysis to our problems is not to be confused with embarking on grandiose schemes, whose primary impact is for show rather than for progress measured in hard economic and social terms.

I would like to emphasize that security can be endangered not only from outside but also from within. If you do not maintain the rate of progress of the economic development of the nation. I would suggest that you would have the most serious crisis, something that would disintegrate India as we know it.