But Parlour says the club must loosen the purse strings, as Liverpool did last summer, to give themselves a chance of success.
"It's all about investment. As much as I hate to say that money is everything, but it's always gone that way.
"Sometimes you have to go beyond your budget, absolutely.
"If you can attract a player and you know he is very keen to go, sometimes you have to push the boat out a little bit further and take the gamble."