Birmingham City boss Steve Bruce is expected to join Wigan Athletic today in a four-year deal worth £8 million.
Wigan will pay Bruce £2m a year and cough £3m compensation for the Geordie, who had a seven-week spell in the Latics hotseat six years ago.
Whelan said: "There is a clause in his Birmingham contract and we have to honour that. But if you are talking about paying £3m for a player or a manager of Steve's quality, I don't think you can argue."