That’s something I think should be looked into by FIFA at some point, the salary and cost of a player although, this has been some worth regulated in the amount a team can spend in the transfers but, over again, you find teams seeking loopholes and cutting corners to archive their goal of getting what player and under certain conditions.
Not like situations in the society have helped much but, the cost of a player could be capped as, every transfer season, it often seems like teams are in the rush to hype the cost of a player who only turns out to deliver on few occasions.
I think the amount that a club would pay to a single player can not be restricted to certain amounts as we all know that player’s importance to the club varies and this is part of what determines the amount to be paid to each player. The only rules that is ok to restrict clubs from over paying some players is the restriction on the total amount a club can spend over a cause period and it is already in effective. Barcelona had already made mistakes of giving some players way too much wage and need to either sale now or wait for the player’s departure.