BBP is not an elected official I think. He is just a party leader but has a lot of power because of his closeness to Daddaji. Actually what he is doing is a bit unethical, like organising an operation for Puja's mom, even without being an MLA or MP or minister. It's like he can do whatever he wants. But because it is Brij, he is not using it for bad things. But he doesn't occupy any post where he is answerable to the people. He is answerable to his party workers, and Daddaji.
Tayaba, I don't think Puja will die. In reality, with a bullet in heart and lungs, don't know if anyone can survive. They may show Puja is a long coma or something, when Arti fights to find her killers.
But, like durum says, it all depends on how long this serial will last. Only the channel will know that.