I did not know that this is where the description of job benefits as "perks" came from. I guess I always thought that they were called that because they were high points of the job or something. Things that make one feel, um, perky. This makes a lot more sense.
perquisite \PER-kwuh-zut\ noun *1 : a privilege, gain, or profit incidental to regular salary or wages; especially : one expected or promised 2 : gratuity, tip 3 : something held or claimed as an exclusive right or possession