The fundamental principle of democracy is the selection of the leader by the people and elections provide us the best opportunity to select the best candidates.
Election after fixed interval poses a pressure on the people in power to perform. Otherwise, they are bound to lose on next election.
Pre-election campaigns provide an opportunity to each candidate to come up with many the plans; he or she will implement if they are given an opportunity.
Nowadays, every candidate is also asked to submit the financial and other details before Election Commission of India, which is displayed on the website.