You can take the state of Tamil Nadu as a counter example. A lot of welfare schemes have photos of politicians both dead and alive. Mostly presented in a way that implies the old guard is passing on something to the new one. It's there in a lot of other states come to think of it. But of course no one did it to such an extent at the national level than modi. Almost every other scheme is under his name

did good part is arguable but to answer your question Indian democracy is very personality driven (for the most part). We took the presidential election and merged it with parliamentary election. People in most states still vote for the leader of the party and not necessarily for the candidates in their constituency. Its like we took the worst part two systems and put them together.

Every bench in every park in India comes inscribed with the name of the Mayor who installed it. This is different, but not much different.