My question is what does it matter, Corchia would ask for 50k per week if you were an English team. It's not like the tax goes back into your club. you pay 50k no matter what.
It does, because what the player would really want is X clean, after tax. That's one of the reasons Spanish clubs could sign Beckham and all those superstars of football, because special taxes for foreigners during their first five? years in Spain. That's been abolished and with higher taxes it will again be hard for Spanish clubs to get that kind of superstars.
There would be the situation today:
Let's imagine Rooney wants to leave ManU and there's interest from Real Madrid and PSG, where Spain has taxes over his wages of 30% and in France it's of 10%. (I don't know the actual tax rates of each country, just making them up for the example)
Do you think it will be the same for Rooney to accept a €100K p/w pretax from Real Madrid than PSG?.
I don't think he'll consider getting net €70K p/w is the same than getting net €90K p/w.
If PSG offered €100K p/w, then Real Madrid would neet to offer at least €135K p/w to match the net wages after tax, which is what the player actually gets, the rest is for the local IRS.
So it follows that a player who is after €90K p/w net wages, would ask for €100K p/w to PSG and €135K p/w to Real Madrid.