I'm guessing that from Robles's perspective, he's already hit the lottery. A World Series ring, millions in signing bonus and payroll. He's happy with what he has. Which, coming from the Dominican, is somewhat understandable. Could he have done a lot more? Most certainly, but that would require hard work and not just getting by on natural talent.
He's lazy, he's not too smart, and he's not afraid to show it to the world.