I can hack a player not being good enough but a lack of effort is unforgivable
As for the owners, they have no impact on his performance on the field and unfortunately only one player can ensure his effort levels and attitude are right. They have a duty to ensure his wages are paid and to my knowledge these are up to date.
If the board then interfere this too would be met with discontent from fans as they are then sticking their beak into football matters