Gordon Taylor has warned that Manchester City's ''stratospheric'' bid to sign Kaka from AC Milan may have dire consequences for the club.
Milan and City are in discussions over the transfer of the Brazilian playmaker for a world-record fee reported to be in the region of £108million.
City officials are believed to be in Milan to thrash out a deal for Kaka and the Eastlands club are reported to have offered the 26-year-old £500,000 a week to move.
Now Taylor, who is the chief executive of the Professional Footballers' Association, believes the fee may cause other clubs to hold the club to ransom in the transfer market and could also cause City's other players to demand higher wages.
''The fee is in the realms of getting stratospheric,'' Taylor told Sky Sports News. ''Whilst he is a quality player, it may well be a rock around Man City's neck in pushing up prices up elsewhere.
''The other players will be wanting to play with him and that would be a real honour for them.
''But the fact is that from Manchester City's point of view, it is going to have all the players thinking the gap is too much between my wage and his.
''If things go well then there is no problem but if not then there will be problems.''
City's owner, Sheikh Mansour, has pumped millions into the club since he took over the club last year.
Manager Mark Hughes is thought to have a huge transfer kitty to spend this transfer window but Taylor believes the Welshman should act cautiously given the current global financial crisis.
''I'm worried that as a game it looks as if football has no worries,'' he said. ''In the magic roundabout of football, the game is in danger of being accused of being as reckless as the banks have clearly been in causing massive problems economically in the world.
''It is not a time for any industry to be spending in a cavalier fashion,'' he added. ''There's a serious problem with the world and finance. This was perfectly illustrated by the banks.
''They were doing fine and then there was suddenly cavalier spending and it has brought a lot of problems for ordinary people and I don't want that to happen to football.
''It looks as if it is immune from the world financial crisis and the fact is that supporters don't want ticket prices to go up as a result of this.''