Who is to say the top brass in the USSR don't know the moon landings were fake? Guss Grissom certainly had his doubts about NASA's capability to land on the moon (he being one who would certainly know), and look what happened to him. Why else for China's rush to land a probe on the moon, if not to give credence to the lie America had been there before, when many are beginning to realise the number and scope of the lies being told?
What people forget is that at the top levels, there are no such things as countries anymore. The leaders of the US, USSR, China etc. are all actors in an elaborate charade, and have been for some time. Globalisation happened some time ago, its now just a matter of letting the serfs know without getting them too upset. How else do you explain events like a Communist homosexual from Kenya becoming president of the (alleged) bastion of Capitalism?