be in a good cause

be in a good cause

To have a beneficial, often charitable, aim or effect. Mom just wants to keep you out of trouble—her rules are in a good cause.
See also: cause, good

be (all) for/in a good ˈcause

worth doing, because it is helping other people: Most motorists seem to accept that the speed cameras are all in a good cause (= they help to keep people safe on the roads by stopping people driving too fast).
See also: cause, good