The France international, who joined United from Juventus in a world-record £89.3million fee last summer, has experienced a very underwhelming debut season under Mourinho.
However, Mourinho thinks that Pogba's price tag normally affects the public opinion on him.
The Portuguese manager told Omnisport: "I think the problem is the tag, the price tag on his back. I hope next summer he's not anymore the highest transfer fee and then the pressure goes to somebody else.
"If his transfer fee was half of it, everybody would say 'what a buy,' 'he's playing more than good'. But everybody expects performances according to that huge transfer fee and that brings pressure and that brings sometimes unfair analysis.
"So I think it's a bit unfair. I hope next season some club beats the record with another player and then the pressure goes somewhere else."