Oh, that reminds me, there's another issue with such a power that would kind of make it so you don't want to use it frequently - unintended consequences.
Let's say you use it to gain an advantage in a job interview. What happens when, in the course of the job, it becomes obvious that you weren't as good in reality as the power allowed you to seem? Now, you're stuck having to use the power repeatedly just to cover your butt. Or, worse yet, what if the people who make decisions are out of range, in the corporate office in the next city over, and you *can't* cover your butt from them? While it may have seemed like an easy-in, that power can lead to you digging yourself into a hole that is worse in the long run.
There's some things, like saving lives, stopping serious harm to people, which we can reasonably guess that the good we do would exceed the harm of consequences. But as the stakes for which you use the power decrease, the chance of having consequences be larger than your actions increase.
I suspect that if you had these powers, you wouldn't be bothering to go to job interviews at all. There are a lot of mostly-victimless (or at least deserving victim) ways to acquire sufficient wealth/standard of living to obviate the need for a job. And if you're trying for employment because it's your life's passion, you probably have sufficient skill in the craft. You'd be using your talents in that case to guarantee winning the contest since that uses a different skill set than actual job performance anyway.