Unfair Advantage to India !!?

Don't u think India is given a unfair amount of advantage by the ICC compared to other nations ? Correct me if I am wrong , when India wins a series their rankings easily go high up the table which I never noticed happening to other nations ! I was amazed to see India 3rd in the rankings !! How ?? India seems to be getting easy games with Zimbabwe or weakened Pakistan and Sri Lanka . Teams like Australia have not even played Zimbabwe for a long time . I feel its unfair way of gaining money !! What do u say ?