I'm not the OP, but to me the world "corruption" is a blanket term used to refer to the apparent or actual distortion of a system for personal gain.

Thus corruption can be found on any system, no matter the scale, and regardless of the shape and form of the gain that may be attained.

This definition implies that hypothetical cases such as a college professor using his right to park free of charge on campus to store his car collection, or a secretary using the company's printer to print out fliers, might surprise people who believe that corruption is the fruit of sinister morally and ethically empty sociopaths who are super wealthy and very powerful.