United have spent big since the retirement of Sir Alex Ferguson without being able to replicate the Scot's success.
"The first thing Ole (Gunnar Solskjaer) has to do is build the squad and I don't think bringing in one or two players for £100m is going to help the players already there," he told the BBC.
“Ole needs five or six with potential. That would give you longevity and allow you to build a squad."
The Norwegian looks to be heading in that direction after the club confirmed the signing of Daniel James from Swansea.