Karim's friends had similar experiences to their young boss, who they saw as more of an older brother. Although they were going to be paid half of what their boss was, they were still more than happy with the fact that they were being paid.
Not only did they receive a small sum of money from working under the Wolf Gang, but they were also young and had yet to do much for the Outlaw Gang. And so, they weren't expecting anything in the first place. Yet, Xavier did not forget about them and gave them the same smile he had given Karim, glad that they were all happy to be paid.
But this was only the start.
In the future, such money wouldn't even appeal to them, as long as they lived up to Xavier's expectations and did all in their power to succeed. Which was exactly what they were planning on doing. And with that, Karim and his friends were even more grateful and driven to make all of Xavier's dreams a reality, which, in the process, accomplished their own.