"Fair play would be everyone having £30m a year to spend," said Redknapp.
"To make it fair play we should be able to spend as much as Manchester United have spent before we play them on Sunday," added Redknapp on Friday.
"That would be fair play, wouldn't it?
"What is fair play because one club can spend £200m on a team and another might spend £8-10m on their team. That's not fair play really, is it?"