The way movies work, you don’t know how much you’ll make in advance. That picture could easily have lost money.
60 mil budget, they could've increased easily to lets say 61 or 65 and let this guy pocket the difference (1 to 5 mil)
What if the stars that got paid millions would've instead cut their own profit for a small amount (eg. 100k) each, that would've provided the man with a reasonable amount of money, while at the same time they wouldn't even feel the difference.
If really there was any budget constraint.