Please separate DRDO from other govt run agencies. It should have its own pay scale to attract talent and reputed academicians with managerial abilities should be hired to manage it.
Same should apply for ISRO, BARC etc. These are the pillars on which we have to build our future. These must be given preferential treatment by the government in terms of money allocation, and given freedom to hire the best machinery and compete with the best in the world.
