Thanks!Well, here are some numbers:
Boom delivery of 144 units survival equipment: 950k cr (9.3ly, 2.2k ls) Tycoon rank
Wing boom delivery of 1578 units survival equipment: 2,600k cr (10.4ly, 5.8k ls) Tycoon rank
So you'd need around 6 people in the wing to make a total amount to equal single missions in pay per volume. Based on this I think wing missions pay around half as what would be sensible, imho.
I assume both missions are from a faction that you are allied with?
I think one example isn't enough to rule out edge cases though.