Wiktionary
overjustify
vb. 1 (context transitive English) To justify excessively; to provide too much justification for. 2 (context transitive psychology English) ''Specifically'', to provide external incentive for an already-internally-motivated behavior, thereby risking the loss of the original motivation.
Usage examples of "overjustify".
They are overjustifying too and are depriving themselves of many satisfactions.