Flying pay only to be paid on the days when you fly....
And would that not also lead to the problems that I have heard about in the 50s (well before my time!!) when "desk fliers" apparently had to get x hrs per year to retain flying pay.
Net result, ground tourists panicking to get the hours in at the end of the year, and then having a disproportionate number of crashes/incidents/accidents.
Tick chasing of the worst sort.....