United winger Ashley Young received a yellow card for simulation during the 2-0 win over Crystal Palace on Saturday and was spoken to by Moyes after the match with the Red Devils boss all for retrospective action for divers.
"I've had a word with him (Young) privately and, as I said after the game, I've said for many years we should have retrospective video for diving," said Moyes.
"We can make up all the things we like about punishment but the rules are there and the referees have got the rules they have to abide by.
"The referee on Saturday did what he had to do, he gave him a yellow card.
"The referee got it correct and he gave the punishment for it, so I don't see why the debate should go on any longer."