User blog comment:CROAgent/Faunus+Human=???/@comment-24144063-20140426024422/@comment-3146930-20140426030832

Except Roman doesn't really seem like he could pay them, even if he wanted to. Going by what we have seen, Roman seems like a small time crook. During one of his first jobs, he hires Junior's henchmen to help him rob a Dust shop (they then all get beat up). He also only seems to rob small Dust shops around the city until the big Dust theft at the end of Volume 1.

The White Fang on the other hand seem to be able to rob entire trains of Dust well before they started working for Roman, going by the Black Trailer and some things Blake mentioned about them. It just doesn't seem like they would turn to Roman for financial aid.