The Frenchman, who arrived at Old Trafford over the summer for a world record £89m fee, has featured in 38 of the 44 games played by Man United this season.
However Cascarino, speaking earlier this week, has noted that Pogba would improve if he felt as if his place in the starting XI was not guaranteed.
“There are certain players who are never taken off by managers regardless of how they are playing,” he said.
“But you knew Jose Mourinho wouldn’t take them off. It’s always the same players who get taken off.
“Not enough substitutions are made on a case by case basis.
“If they were, Pogba should have been taken off against Bournemouth and also earlier in the season when he gave away a penalty and looked poor in United’s 1-1 draw with Liverpool.
“Pogba might be Mourinho’s record signing and a talented player but he needs to know he’s not invincible.”
The likes of Henrikh Mkhitaryan, Anthony Martial and – judging by his strong display against AFC Bournemouth – Luke Shaw have undoubtedly benefitted from spending time on the bench and being forced to demonstrate their mettle in training. But I would argue that, in Pogba’s case, the dynamic is different.
This is because Mourinho bought him for a specific purpose: to function as the side’s midfield nucleus, dictating the overall tempo moving forward with his own approach, driving forward and getting the ball moving. It is no coincidence that United’s best performances this season have come when Pogba has also been at his best; United’s worst performances, in turn, have come when the Frenchman has struggled.
The process of endearing Pogba to this side, then, is not necessarily one of perfection but amalgamation, with perfection personified instead in now United operate as a collective. With this in mind, it only really makes sense to hand Pogba as much time on the pitch as possible.