They aren't. Needs are basic in nature, like food, shelter etc. Refer to Maslow's hierarchy figure below: Hierarchy of Needs. Wants: Want is a feeling for something you lack. Desire: Desire is an extension of a want, with clear objective of filling the gap that want had left with.
4,821 workers were killed on the job in the United States. The fatal injury rate was 3.4 per 100,000 workers, up from a rate of 3.3 per 100,000 workers in 2013. An estimated 50,000 people died from occupational diseases. 150 workers died each day from hazardous working conditions. Nearly 3.8 million work-related injuries and illnesses were reported.
A total of 77 of those were multiple-fatality homicide incidents in which two or more workers were killed, including 69 homicides and 8 assailant suicides, all of whom were in work status at the time of the incident. Shootings accounted for 78 percent of all workplace homicides in 2010 (405 fatal injuries).