Murphy is unhappy hearing Brewster has paraded his Champions League winner's medal on Instagram and Twitter despite not having played a single minute of senior football.
Murphy told talkSPORT, “That's ludicrous. What you're talking about is the mindset of any young player.
“You can control certain elements of a young player's development. Giving them winner's medals now isn't going to help them.
“It's not going to create a problem not giving them medals. You've got to incentivise people getting in the team. Is it just personal pride left?"