I'm not sure about the "making up" instead of getting paid less part, but those of us who have PTO (paid time off) are very used to having to take vacation b/c the office is closed. My sick leave, vacation and holidays all come from exactly the same pool. My office is closed Dec. 24 and 25 and Jan. 1, so those days are in essence mandatory vacation. The only time we don't have to take PTO is when the director closes the office for inclement weather (or in the case of the ice storm recently, no power).