I like all the suggestions, shows we are thinking logically - awaiting the official vote count though. The problem with making all monies trip based to eradicate sickness would be when people are genuinely ill, or long term ill - They would be seriously financially impacted - also when on leave.
What about a points style system those with sickness without doctors notes gain points, the higher the points the lower you come in the pecking order for things like leave, bidding for trips, standby/staff travel on top of the criteria which already exist ?
Though again these things all encourage people to fly when not well and pass things on to crew and other pa whe not fit for duty.
Maybe just a sensible basic with no strings - do a complete U turn get rid of monthly standby watch morale increase exponentially - crew sickness drops. If it doesn't increase a points/penalty system for high sickness (not doctor certified). After all no one likes repeat sick offenders it screws everyone.