Listen to me guys and carefully. We would like to get our hands on every military technology out there that can help us defend our country. Often, you'll see professionals telling you that we do not have this or that because we don't need it. Believe me, that is just a feel good argument and nothing more. Let me give you an example. We were made to believe that S2 has a range of 2500 km. I was told this by an engineer from NDC who later (when S3 was about to be tested) told me that the real range with the standard payload was always around 1600 km. When i asked the guy that why are we not working on BMs with greater ranges, he told me that our current arsenal covers all strategic targets. That was a bullshit statement and S3 proved that.
We have a very limited budget and we do the best we can with it. Believe me, when an ICBM or a twin engine fighter is feasible, financially and technically, we'll have it.
We improvise when we can and have to. The improvised solution may be imperfect and risky, so we definately try to get the proper solution when it becomes possible.