Barak-8 was developed over 10 years and India has contributed to its motor and launcher. India has also made the seeker now and with the experience in algorithm of detecting target as used in seekers of Brahmos, Akash, NAG and radars of Akash and BMD, India can use the algorithm in BARAK-8 seekers and radars too.
Making generalised statements like this is incorrect as politicians did take development of defence seriously. Indira got help from USSR when USA sided with Pakistan to attack India and then development of weapons happened. This was continued even under Rajiv Gandhi to some extent. But the pace of progress was quite low and if not for USSR giving ToT, things would have been too slow. Narasimha Rao was instrumental in development of ISRO and ballistic missile while also improving radar and naval technology. BJP govt in 1998-2004 started several projects for building indigenous items like Akash, BMD, Naval construction, Brahmos project, indigenisation of Su30, Tejas, Kaveri etc which worked well till FY 2007-8 but then curtailed by UPA once they got their hold on power. Nevertheless, many development and the experience obtained still continued in slow pace, enough to keep experience intact.