expedient

Suitable to effect some desired end or the purpose intended.

“Most people, faced with a decision, will choose the most expedient option.”

Affording short-term benefit, often at the expense of the long-term.

Governed by self-interest, often short-term self-interest.

Serving to promote your interest

“was merciful only when mercy was expedient”

Appropriate to a purpose; practical

“in the circumstances it was expedient to express loyalty”

A method or means for achieving a particular result, especially when direct or efficient; a resource.

A means to an end; not necessarily a principled or ethical one