"Everyone has a price."
Gwafa Hazid is a master merchant of Bant's Grand Caravan, the world's greatest convoy of leotau-pulled trade carts and carriages, which ranges all over Bant's five nations. He's a shrewd businessman, always ending up on the gainful end of the deal, and he's constantly on the move, forever crisscrossing Bant to bring wagonsful of merchandise to waiting customers. And Hazid's deals aren't always exactly to the letter of Bant's laws, yet whenever any not-quite-legal goods find their way onto one of his many caravans, his head never finds its way into the pillory for it. When border inspectors or Blessed-caste rulers look to constrict his actions, he persuades prying eyes to look elsewhere.
In fact, Hazid is such an expert at persuasion, he can cause just about anyone to stand there.
He wants more than what life gave him, and that's tantamount to sin in Bant's rigid caste hierarchy. He's drawn to reach higher and farther than the boundaries of his station, which gives him reason to lie, to sneak, and to buy off potential threats with some of his ample coin. By dangling the right promises in front of Hazid's ambitious mind, one might be able to sway him to perform even darker deeds on Bant.
In other words, he's prime material for minionhood, which is exactly why Nicol Bolas reached out to him to serve as part of the dragon's master plan. Neither the totality of that plan nor Hazid's role in it have yet to be revealed, but Hazid's grasping ambition will no doubt be the key to his fate—as will it be key to the fate of Alara itself.
Gwafa Hazid has taken advantage of his lifelong familiarity with Bant's laws, his knowledge of its bylaw idiosyncrasies and loopholes in enforcement, for his own purposes. He's transcended the role of mere rule-following caravan-merchant to become a rule manipulator—which, on Bant, is a pretty powerful thing to be.