"expedient action" is correct and usable in written English.
You can use it to explain that an action was taken quickly and efficiently in order to resolve a problem. For example: "We took expedient action to ensure that all of our customers received their orders on time."
Moral philosophers, for example, are concerned with the distinction between dutiful and expedient actions.
The distinction between dutiful and expedient actions is not an empirical classification since actions which conform to the principle of utility could also be instances of the principle of duty, and moral philosophers would want to distinguish between such principles even in circumstances where prioritising one principle over the other would make no difference to the action one has to perform.
Navigating without a strategic gyroscope, and with maladroit diplomacy run by appointees who have skipped too many grades, we repeatedly have painted ourselves into a corner from which there is no escape other than by taking risky and highly costly expedient actions.
On the importance of doing the right thing (even if that wasn't the most expedient course of action).
An expedient and necessary action is to analyze and observe the development of body posture of the most vulnerable occupational groups, ranging from the earliest period of vocational education.
What, then, of the expedient justifiers of state action who defend unchecked surveillance upheld by secret laws in the name of safety?
The mayor's actions may be politically expedient, but research and practice have shown repeatedly that retention leads to an increased sense of failure for children, teachers and families.
He intended that these actions would be "very expedient for preventing and avoiding of infection of sickness" (1 ).
Instead of a world revealed through dialogue and action you get the desperate expedient of a voiceover.
Now, though, perhaps through the simple expedient of being more upright in his action and leaning back just a little more, he has been able to hit a good length hard.
