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.
From 2006 to 2010, an average of 551 workers per year were killed as a result of work-related homicides. In 2010 (the last year for which final data are available), CFOI reported a total of 518 workplace homicides, or 11 percent of all fatal work injuries that occurred that year.