You know, people around here say we can't keep players in the team if they decided to leave we don't want

unmotivated

players playing for us.
But if every team does that then they'll screwed big time.
Just take a look at dourtmond, every club in Europe are desperate to sign either Hummels or Reus and they can offer them 3* their salaries if they want to but the management stood firm and refused to do that ! The management job is to convince their star players to stay.
If they can't, then they make sure to get the highest bid possible to these players ( Gotze, Suarez, Bale, cristiano ronaldo are just few examples.