Opposite number Warnock took exception to his words, saying: "I think that's a disgraceful statement. If I'd spent nearly £4.5m on players, I'd probably say a bit less than that.
"He should keep his mouth shut and ask how come we carved them up so often and created so many chances."
The Reds now lie 9th in the Championship, level on points with QPR who are in the final play-off place.
A big game now awaits next Sunday with a 5pm kick-off in Wales where Cardiff City are the hosts for a live terrestrial TV encounter.