Permanently Short Staffed

When I first started working - late 80's the office enivornment was totally different. Our department had two "word processing specialists", we had two permanent file clerks, one person who would do the faxing and copying. This is addition to the 3 secretaries (I was one), office manager, executive assistant positions. I am called an "office coordinator". I do data entry, maintain district files, all copying and faxing, scanning and email docs, backup switchboard operator, backup invoice coordinator and the director's assistant. Of course, one of my main duties is "special projects". This means anything else that comes up that they need help with. We are migrating to a new system in Apri. We had a meeting this morning where they mentioned we need to be available for weekend work. When someone leave the department, the positions need to be justified. We lost two people recently (went to departments that are considered more "safe) - they did not fill the positions - they just move the work around. Of course, in the background, is the refrain, "be grateful you have a job". People talk about being super busy and swamped like its job security.