Well, sometimes things are not that simple. According to Medterms.com:
"Fear of work: An abnormal and persistent fear of work. Sufferers of this fear experience undue anxiety about the workplace environment even though they realize their fear is irrational. Their fear may actually be a combination of fears, such fear of failing at assigned tasks, fear of speaking before groups at work, or fear of socializing with co-workers.
"Fear of work is termed "ergophobia," a word derived from the Greek "ergon" (work) and "phobos" (fear)."