The Chelsea manager was speaking about UEFA's FFP policy which was designed to ensure a club's expenditure does not exceed its income.
A summer of lavish spending has ensued regardless, though, and Mourinho - who believes his club have taken a correct and prudent approach - is unhappy that some continue to splash the cash.
"Clubs have to think about the future, where financial fair play will make us think about football in a different way," he said in an interview with ESPN which was carried by several national newspapers.
"We have already started but other clubs seem to think FFP will never start or they think they can override what FFP says and determines. They have continued spending incredible sums. We have gone with another thought."
Chelsea have not exactly traded on a shoestring themselves, with the likes of Andre Schurrle, Marco Van Ginkel, Willian and Samuel Eto'o all arriving for varying amounts.
Mourinho, though, points to an investment in youth as evidence that Chelsea are using the market sensibly.
"The club has invested in young players and, with those young players mixed with the players who came to Chelsea in the past, we are constructing a team to compete directly with those who invest more," he said, with 32-year-old Eto'o the exception to that.
"But we are happy. We have a young team with a bright future. We have two players almost for every position, some more experienced, some with more potential for growth. And we have other players, loaned out for one, two or three years, that have to come back.
"And with less investment, we intend to maintain the level of these economic sharks who seem like they will continue with the desire to buy and they will keep buying. I'm happy for them that they have that objective."