Kevin De Bruyne has reportedly had his wages quadrupled by Manchester City.
Wolfsburg sporting director Klaus Allofs suggests that the Belgian attacking midfielder, who joined City for around £54million in the summer, is now earning four times as much as he did in the Bundesliga.
Of the big-money transfer, Allofs told Die Welt: "We spent a long time weighing up all our options and trying to keep Kevin at Wolfsburg. But at some point, we reached the conclusion that it would be best to allow him to move.
"When a player has an offer from another team where can make four times as much money, you have to take into account what such an offer does to a player.
"Kevin received an offer that could very well be a once in a lifetime opportunity. There is no guarantee that he would ever get such an offer again.
"We have certain limits that teams like Manchester City, Paris Saint-Germain, Barcelona or Bayern Munich do not have. It is totally unrealistic to claim that nobody can lure players away from us."