He really doesn't. Every time I watch ManU, Pogba is playing all over the pitch, he has a huge amount of freedom to roam around the pitch under Mou. He's constantly making runs around and into the opponent's box, and is often get caught out far up the pitch. Mourinho isn't making him sit back in a defensive + build-up role in the slightest.
People could blame Mou for failing to motivate Paul properly, and expecting him to work hard tracking back when the opponent has the ball (though this should be demanded of any midfield player), but Pogba continually playing like piss and seemingly not giving a shit is on Pogba alone.