The restrictions will prevent clubs spending more than they have, and Mourinho thinks it is a good thing.
The Portuguese told AS: "Madrid, Barca and Bayern are all clubs that have a unique history.
"You can't buy that with money. The titles, the European Cups, the history, the fanbase, you can't achieve these things just by spending money.
"And all the best players want to be at these clubs, at these three clubs and a few others that have hundreds of trophies between them.
"It's still an important factor for the players. Then you have to bear in mind that Financial Fair Play is coming in soon, and Platini says he wants it followed to the letter.
"They are going to impose restrictions on clubs that aren't well structured and make life difficult for them, even if they have piles of money.
"I know my club Madrid well and the infrastructure is in place to cope (with the new rules)."