"Football is very well remunerated at this level. It's like we live in a bubble. Compared to the rest of society, we earn a ridiculous amount. It's unfathomable," Mata said in an interview on Spanish television programme "Salvados", broadcast on Sunday.
"With respect to the world of football, I earn a normal wage. But compared to 99.9 percent of Spain and the rest of the world, I earn a silly amount."
The Spain international also said he sympathised with critics of the modern game, who claim football has become too commercialised, and criticised the attitude of some young players who become arrogant after turning professional.
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"I can understand what they're talking about. The business side of football makes it seem as though the owners are now more important than the fans," the 27-year-old added.
"Every player thinks he's Diego Maradona when he joins a big club. That happens to all of us but then you notice it in the younger players.
"You see kids who think they're rock stars; wearing extravagant clothes and driving flash cars... sometimes you have to take them aside and have a word."
Mata added: "I don't enjoy the business side of football. I love the game. I love training and competing.
"I'd take a pay cut if there was less business involvement in the sport. At this level, we're very well paid and sometimes you start thinking there isn't much of a difference between x and x+3."
(Reporting by Richard Martin; Editing by John O'Brien)
