The undesirability of a job can have upward pressure on its salary -- like around here, guys that pump out the portable johns get paid 50, 60k. But that pressure doesn't operate on fast food like it does for operating the sewage truck or working in a coal mine because you actually have to have a meaningful skillset to do those jobs as well, there's competition for the talent. That's not the case for those manning yon grease trap.