Firstly, there's not much point in providing a source when you limit yours to the top Google hit which is a speculative Mirror headline.
As far as I'm concerned its fact. (Bush Blade seems to think so as well) That came from NW at a party in a conversation I was privy too with people who played for him in non league, after he'd had a few red wines. He thought it was quite funny. So I've good reason to state it as a fact.
Yes I speculated that the money and being nearer home would make him a shoe in plus it was a PL job . It's not an uncommon opinion of him that he likes money is it?
The normal gregarious Neil back tracked a bit a year later in this Q&A in FourFourTwo, most unlike him
"
Why didn’t you join Portsmouth last December? Be honest, did you think they were already down?
Paul Potter, via e-mail
No, I didn’t think they were already down, but enough has been said about that really. I don’t want to go into it again, it’s all gone now."
Read more at
http://www.fourfourtwo.com/features/neil-warnock-one-one#CL3EClsk5YzFia9l.99
Wasn't there also an FA investigation over betting patterns over the Redknapp appointment the gist being that Redknapp always had the job in his pocket and it was a betting coup.