The number of MPs with the leader matters yaar. Mayawati hasn't got the numbers to topple the government, but the Communists have around 60 MPs who can make a difference. You may remember, when the UPA was making numbers four years ago, a crucial margin of about 30 was needed and after a lot of trading the Commies came forward with about 60 seats offering outside support - that is not joining the Government. So, Somnath Chatterjee was made the Speaker, which is a cabinet minister level position.