With as big as an airline as this is with as many bases as it has I expect there are always non-new hire non-vol reserves due changing staffing levels--some more abrupt than others--due to reactions to shifting demand and, more substantially, to the revolving door of senior managers who always have the new idea for where to base the fleet. It's less disruptive than changing the CEO every 18 months while still making the shareholders think that someone's doing something. As such, reserve affects all but the most senior pilots at one time or another, even if they react instantly to bid away from it.