The phrase "expedient by" is grammatically correct and can be used in written English.
It is typically used to describe a course of action or decision that is practical, efficient, and convenient in a specific situation. Example: It was expedient by the company to implement cost-cutting measures in order to stay competitive in the market.
This successful policy was later employed as a regular wartime expedient by the French monarchy.
Although this was initially a temporary expedient, by the 15th century it had become a permanent institution.
To her and the Obamas, failing to acknowledge the racial dimension of the 2008 campaign constituted dereliction of duty, even if silence on the subject was considered politically expedient by other senior campaign staff members.
Surely, I'll wake up and read that Simon Cowell or Ed Sheeran or Taylor Swift or someone, anyone, is organising a song, something which acts as the awareness-raising expedient by which people can gather and contribute?
The government, Thoreau argues, is but an expedient by which we succeed "in letting one another alone" (R, 64).
After all, these "measures" had been judged "necessary and expedient" by the president, so the least Congress could do was to take a look at them.
In a sequence of lushly violent, staccato scenes whose cinematic potential appealed to Eisenstein, the novel recounts the Communist uprising in Shanghai, its brutal repression by Chiang Kai-shek, and its expedient betrayal by the Soviets.
Human rights abuses are almost always justified as a temporary expedient prompted by a security crisis.
However it is also the result of expedient posturing by state politicians who have little interest in foreign affairs.
No matter how tempting or expedient, trials by military commission will prove disastrous -- to the war against terrorism, to the Constitution and to the rule of law.
I therefore feel that it is unfair to compare negatively Amtrak's efforts to reintroduce the American people to expedient travel by rail to those of other countries.
