The Swedish striker moved to Manchester United on a free transfer in the summer after his contract at Paris Saint-Germain expired.
Ibrahimovic is reported to earn in excess of £200,000-per-week at Old Trafford, but Raiola claims he could have lined his pockets even further had he decided to move to the Far East.
Speaking to Il Giornale, he said: “Ibrahimovic is the best. He turned down €100m net from the Chinese! He doesn’t want more money, he wants to win.
“I’ve been lucky, I’ve always had champions. Zlatan, [Pavel] Nedved, Maxwell and now [Blaise] Matuidi and [Gigio] Donnarumma.
“He [Donnarumma] will become even better than [Gigi] Buffon, because whoever comes in the future is always better than the past.”
Raiola also claims that another of his clients, Mario Balotelli, must follow the example set by Ibrahimovic if he is ever to reach his full potential.
“Mario is a phenomenon, but he’s Balotelli,” Raiola joked.
“He was lucky enough to be adopted by two great people, but in a tough town [Bagnolo Mella], let’s face it: a racist one.
“He suffered a lot when he was a child, and he’s always been that way in the head. If he had the mentality of Zlatan, with his talent he’d have won five Ballon d’Ors.”