And the retired midfielder has now named Bale and Neymar as being two of the only players who could seriously help his old side.
"If [Jose Mourinho] can change something through the summer, buy new players and he can find a way of playing that maybe is a little bit more entertaining then who knows, you don't know," Scholes told the Daily Mail.
"A lot can happen over the summer. Let's hope we can get close again. We need some good attacking players. I think the nucleus of the squad is quite good, there's some really good young attacking players.
Man Utd transfer news: Gareth Bale or Neymar? Paul Scholes sends Jose Mourinho demand (Image: GETTY)
Man Utd transfer news: Gareth Bale or Neymar? Paul Scholes sends Jose Mourinho demand (Image: GETTY)
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"I think he possibly needs a bit of help with Lukaku. He seems like the only out-and-out centre-forward he's got.
"It's hard to know what's available, would Gareth Bale be available? People like Neymar will they be available? I don't know. These are the type of special players that I think United need.
"They'll have to improve massively to get anywhere near a final I think with the amount of top teams that are in the competition now, they don't look anywhere close to that at the minute."
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Talk of Bale returning to the Premier League with United has ramped up after he hinted he could leave Real after the Champions League final.
"Obviously I need to play," said the winger. "That hasn’t happened this season for one reason or another.
"I was injured for five or six games and I’ve been fit ever since. I’ll have to sit down in the summer, discuss it with my agent and take it from there."