When the security council gets so large that even little powerless countries can get on it and gain the power to veto everything at the UN, the UN is officially worthless.
How do you account for the fact that the United Nations Charter follows the format of the Russian (USSR) Constitution of 1936 rather than the format of the (Covenant of the) League of Nations? Would you feel there was any significance in the fact that the general secretary for the organization which drew up the charter was Alger Hiss? …The UN was worthless from its outset. Hiss designed it as a vehicle through which to destroy the USA.
— The Naked Communist, Chapter 8
The Security Council is still the same size it has always been.