The Frenchman finalised his £89 million move to Old Trafford in the early hours of Tuesday morning ending weeks of speculation regarding his future.
Pogba had been linked with numerous clubs, but Man United officially announced he had been allowed by Juventus to complete a medical on Monday afternoon.
Speaking about their comments, Mourinho insists their clubs are not big enough to conduct such a deal.
“Sometimes in football, things happen and the club breaks the record, but this is only possible at clubs like Manchester United,” he said.
“When I heard some of the comments and heard some of the managers criticising that, I don’t think they ever have this problem because, to have this problem, you need to be at one of the top clubs in the world.”
Speaking before the deal was confirmed, Wenger said Pogba’s valuation was “completely crazy”, while Klopp said he would not spend that much on a single player even if his funds were unlimited.
Mourinho had previously criticised their comments suggesting it was not ethical for his Premier League rivals to make such comments about his new signings.
The Portuguese boss now has everything in place to succeed at Old Trafford and will be relishing the opportunity to get back into work in the Premier League after his reputation took a slight hit after he was fired from Chelsea last season.