The Australian, who will join Red Bull next year, revealed that the issue of outstanding pay was brought up during a meeting of the Grand Prix Drivers' Association in Abu Dhabi last weekend.
He told ESPNF1: "It's not a nice situation to be in and he is a World Champion for crying out loud, he should be getting paid, it's as simple as that.
"Obviously it's not a nice place to be and unfortunately I don't think he's the only one.
"This is the top of motorsport in the world and if a driver like Raikkonen is not getting paid then the sport is not in the best shape."
Raikkonen rejoins Ferrari at the end of the season, having won the world title with the Italian team in 2007.