Think back to when you were in your 20s. I'm sure you were plenty ambitious. After all, you eventually rose to a management position. Of course, you probably didn't demand any of your promotions. That's the difference between you and your employee, right? The arrogance! The entitlement! How dare he.
Translation: Years after scientific rigor disproved the "entitled millennials" theory, people still preached it as gospel. Sigh. So, your solution needs to bridge those two viewpoints. Temper the arrogance. Embrace the confidence and reward it, once you think the work merits it.
Inc Silly 20 year olds thinking that crippling debt from higher education entitles them to a decent income so they can cover basic living expenses. Grow up!