RichThesaurus
in one's (best) interests
vs
politic
in one's (best) interests
politic
adj
Discreet and diplomatic.
Shrewd, prudent and expedient.
Artful, crafty or cunning.
How often have the words
in one's (best) interests
and
politic
occurred in a corpus of books?
(source:
Google Ngram Viewer
)