U.S. Customs. Why do I never pay customs?

I'm not talking about overhead costs as those are employer bound. I mean as employer give yourself a raise and now you employees cost more. That would not be fair.
So Basically I'm talking about costs directly linked to my name linked to employment (and in general for higher priced employees in Belgium)

westfw:
.....("consultants" are much cheaper for some reason, or perhaps just come off the books differently.)

I would say it comes off the books differently.