Why do we need the two …

1. Rajya Sabha reflects a federal character by representing the units of the Union. While, Lok Sabha represents spirit of people.
2. Both Houses plays positive role in matters of Legislations.
3. They check on abuses of democracy in their own defined jurisdictions.
4. Two houses checks the tendency of Government to take populist measures under an unstable political Scenario.
5. Rajya Sabha also poses a moral authority over a care taker government (when LS dissolves)
6. Two vetoes (from two houses) on the matter of policies of Government give Democracy wider scope to become healthier.
7. Second Chamber members are much different from Elected Member of Lok Sabha. Most of RS members are experts in their field, like businessmen, historians, journalist, actors, law expert, etc they helps in ushering and presenting aspirations of all kind freedoms provided by constitution of India in the parliament

The emergency situation when Lok Sabha is dissolved, only Rajya Sabha can take vital decisions in interest of nation and States. Example Kargil War(1999).