If not, then the opposite applies. If you have a player who earns a basic 20,000, he will then be able to earn more money through his contribution on the pitch. Goal bonuses already exist, but the bonuses I have in mind would be based more on the performance as a whole. Basically, you get the reward for doing your job properly. Off-pitch performance is also important as players can be real club men.
Some players see training as a chance to improve both themselves and the team as a whole.
Others see it as unimportant and don't put the effort in. There would have to be compensation for when players are injured - as they obviously won't be able to perform on the pitch if they are unfit to play. Unions are always strongly against what is, essentially, performance related pay. But however they may hate it, in the end it rewards those who want to do well. Players may not be playing 100 per cent, but if they are putting the effort in then they will be rewarded.