You, or anyone doesn't do anything.
This is totally up to the player.
The best example of this comes from another sport.
Red Auerbach, President and General Manager of the Boston Celtics from the late 1960s into the 1990s (after Head Coaching the Celtics to 8 straight NBA Championships and 9 in 10 years), was totally handcuffed when it came time to renew Larry Bird's contract in 1983. Red had nothing to negotiate with - Larry did everything. So Auerbach made Larry the highest paid player at that time.
How did Larry Bird respond in the summer of 1983?
Larry Bird was NBA League MVP in 1984, 1985, & 1986 and won NBA Championships in 1984 & 1986 (and was 2 wins shy against Magic Johnson's Showtime Lakers from 3 Championships in a row in 1985).
Again, it is up to the individual. General Managers are rolling the dice.