Let me try another way. P = profits, R = revenue, S = salary, E = expenses:
P = R - S - E
Every dollar you get in salary is a 1:1 drop in profits. Any bonus B you get,
P = R - (S + B) - E
is the same. You might expect from this, then, that if you're offered a S+B package, the S would be lower than what you'd get with a pure S offer, by the expected amount of B. And you'd be right. I've been on both sides of the negotiating table, and this is how it works.