Sharethematch.com ambassador Andy Gray was talking exclusively to tribalfootball.com
The money aspect is the thing that worries me about the transfer - if that is Ba's reason for moving - then it's not one I would agree with.
We don't know whether Benitez will alter his system, but I tend to think not. He has too many players like Oscar, Juan Mata, Eden Hazard and Marko Marin, who all float about and aren't tied down to any real position - they certainly don't have any defensive duties.
They could play Ba and Torres up front and then have Mata one side and Hazard the other, it's very narrow though, and then play with two central midfield players.
If I was Chelsea I would have a look at that, although you would think they will stick with one up top.
You tend to think Ba won't play every game the way he did at Newcastle. Is that a good career move? Will earning twice as much keep him happy? I don't know the guy or his mentality.
It wouldn't keep me happy - I would much rather be at a club like Newcastle playing week-in-week-out and scoring goals than going to a club where I can't even be guaranteed a game.
Roy turned around and said, 'hold on a minute, what's the difference? I would much rather play at United and end up with £30 million than go to Inter Milan and end up with £50 million, because I know I wouldn't be as happy'.
Therein lies the answer for me. There are certain people who will move just for money and at the end of their career they'll think nothing of it, because a lot of players see football as a job now.
But when you're someone who wants to contribute and win things and play football matches, it's a different kettle of fish.
Ba is allegedly on £40,000-a-week, plus £20,000 every time he steps on the pitch, so that's a quarter of a million every month.
An ordinary guy supporting Newcastle cannot comprehend those figures, and yet they're not good enough to keep the guy at the club.
It's each to his own - obviously if you go to a bigger club and you're playing every week then you have to go, and if you're earning more money that's great.
But the bottom line is, I don't think he'll be happy sitting on the bench.
Andy Gray is an official ambassador for Sharethematch.com - Football's Social Network. Available now for FREE online or at the App Store; http://itunes.apple.com/gb/app/share-the-match/id450784289?mt=8