Why Narendra Modi & other ministers and politicians have need security?

Why do politicians and ministers need security? Because they are not doing their job properly. They are afraid that they will be attacked by the public. If those people are doing their job properly, then they do not need security. Look at the Prime Minister of Nepal. The Prime Minister of Nepal comes among the public without any kind of security, meets the public, listens to the public's questions and also solves them.