Asking for a job interview is much like approaching someone for a date. You are approaching someone you may not know at all, but have an interest in, and have to put yourself in the uncomfortable position of possibly being rejected, maybe even publicly. However, with a wingman you will have more confidence and even a more attractive appearance. The best job interview wingman is someone who works at the company already or knows the job interviewer. Your association with that person will give you the appearance of someone who is already closer to the inside than a stranger who is also applying for the job. You will also feel more confident approaching the interviewer as you already have something in common: your wingman.
If you want to move to the front of the line for the job, consider going into the interview process with a wingman supporting your efforts! Nowadays there are lots of ways to find a wingman. LinkedIn is a great place to look: local politicians, employment agency managers, and human resource managers are some of the most connected people. You may already have connections to these people who can serve as a wingman or introduce you to someone who can.