by using that issues, one will not able to divide the vote bank.
that issues can be only used against the ruling party. Not a permanent issue, as the one who opposes knows they themself will not able to solve those.
The easiest way is to use caste and religion, then region. you can easily confirm your vote bank. It is very difficult to get your vote bank fixed by engaged in road development &social services. You can get fame easily by declaring yourself the Messiah of any specific religion or caste. your followers will be busy fighting with others and you can sit back, relax and enjoy the incoming money from all sides