I have never worked in an organization big enough where the DBA was only that. The DBA has had to to other things. The DBA is usually combined with the server admin. or programming roles; sometimes all three together.

The problem with this approach is that no one can be expert in all of them so one role suffers. It's very difficult to place a monetary value on the DBA role in the small shop environment. The value comes in the performance, consistency, and quality of the database.