"I'm OK with it," stated the Ipswich Town manager. "It's just the way it is.
"Clubs are prepared to pay that, people talk about Ronaldo going for £80m - I look at other players and think Ronaldo's cheap for £80m."
Keane, whose Ipswich side are in Ireland on a pre-season tour, added: "He's the best player in the world. Footballers are classed as entertainers and if you look at any industry the top people get the top money."