FIFA president Gianni Infantino has claimed that football's transfer market needs to be "seriously revised" and for greater "clarity and transparency" to be applied.
The Swiss-Italian, who took over as head of the governing body in February, also said that he is against clubs "hoarding" players, and suggested introducing squad limits.
Infantino is quoted by BBC Sport as saying: "The perception is that there is something strange happening with these transfers. Several billion US dollars are moved in a window, so it's important that it happens in a clean way.
"It is a transfer system which has been essentially developed back in 2000-2001. After 15 years it is time to seriously revise it and bring in maybe a little bit more transparency and a little bit more clarity in terms of the rules.
"It doesn't feel right for a club to just hoard the best young players and then to park them left and right. It is not good for the development of the player or the club. We have to work on squad size limits."
It is common in England for clubs not to disclose transfer fees paid for players, while there is no rule against the practice of signing a glut of young players.
