Exactly
If moving to performance related pay then it's fair to expect to know how much MORE will be given in the good times. Singapore airlines have a variable component to the pay package. At the moment it is worth zero due to the world financial crisis plunging the airline into the red. Effectively a 10% pay cut for the pilots. However during the good times it has been substantial.
Now MK pilots know how much they'll lose on the swings, let them know how much they'll gain on the roundabouts.