Lack of effort by the Corporate Staff to conduct regular reviews and make attempts to secure their field employees billing rate increases. Epitec has a tendency to treat employees that don't "kick up" as gimmees; ones that don't need paying attention to. When you do inquire about the possibility of an increase, you get the old standard contractor line: "We can't give you a raise unless we get a Billing Rate increase". True, but it is up to Epitec to approach the client for this ... not the other way around. They seem to have a hard time with that concept.
My advice here: be persistent! I haven't had an increase since 2009 (which was rescinded three months later due to a client policy) and this was initiated by the client. When you have been with the same client as long as I have, they will do these things for you, but it is really Epitec's place to do so.