Wrex laughed out loud when they entered the elevator.
"I haven't had this much fun in years," he said jovially. "You sure know how to negotiate like a krogan, Shepard."
"I'll say," Garrus spoke. "And punishing the superior instead of subordinate? Any turian would applaud you. Why did you insist on bringing me and Wrex for the ride, though?"
"Turians by stereotype still hate humans," Marcus said, "and krogan hate the turian's guts. I am the human that has both a turian professional and a krogan battlemaster working in tandem for him. That means this is more than me just paying them; this is the power you can't buy. They will be intimidated. They will be thinking and fearing of what else I can bring to bear. This was far more effective than if a single Spectre had entered that room."
Wrex turned to look at Garrus.
"Listen to the man, kid," he rumbled. "You might learn something if you take that turian stick out of your ass."
"Shouldn't you be careful about thinking too much, Wrex," Garrus jabbed right back. "Too much brain might crack that thick plate of yours. How're you gonna butt heads?"
"Hahahahahaaaa!" Wrex laughed out loud. "Good. You're learning. We'll remove the good turian outta you yet."