A "willing accomplice" refers to someone who is ready and eager to help or participate in something, usually in a dishonest or illicit activity. They are fully aware of what they are doing and actively support it. Full definition
Good to see the DECC — willing accomplices in implementing Britain's energy disaster — quick to front up with reassuring words for British power punters! (stopthesethings.com)
To escape the cops, he masquerades as the manager of a struggling country - western band called the Dixie Dancekings, who are so desperate for a gig that they become willing accomplices to his misdeeds. (qwipster.net)
«There are so many willing accomplices to what's going on,» the scientist added. (thetyee.ca)