Seniority should NEVER be the sole determinant for getting a job. In fact, it should only be considered if all other factors are equal. Clearly, that was not the case here.
I hire for a nursing position requiring very specific ER/critical care background. Despite detailed descriptions in our website posting of experience needed & duties involved, people tend to think the job is a cakewalk that any nurse should be able to do. When I send very polite "Thank you, but no" letters in response to unqualified applicants, not infrequently in return I get indignant letters, e-mails and phone calls from nurses who just can't believe they're not qualified for this (or ANY) nursing job.
Several very unpleasant nurses have called me and argued with me about the job qualifications or about their own experience. One nurse abruptly asked me what my own background was, and when I told her I was a former ICU nurse, said nastily, "Oh, I see. So that's why I'M being shut out." No, sweetie, you're being "shut out" because you're A)unqualified for this particular position---DEAL, already!, and B) 'cause you're a psycho. Have a nice day, now.
Some people REALLY don't get it. I'm just trying to develop a thicker skin and not take it personally. But I guess there will always be people like the IV nurse in Chuckie's original post who think the world owes them a living--or a raise, or a transfer, or a promotion--just 'cause they bother to show up every day.