Involving or based on what is expedient:an expediential policy...
Timing itself is critical: a war or violent event in itself enhances the expediental ethic and leads to callousness.
Fontinell deplores the misconceptions of Pragmatism which characterize the movement as “a kind of unfeeling, unprincipled, non-idealistic, expediental response to human problems”.
Action is an effort to produce certain consequences and is therefore essentially expediential.