Nobody deserves tenure, with the possible exception of federal judges. University professors don’t deserve tenure; civil servants don’t deserve tenure; police and firefighters don’t deserve tenure; school teachers don’t deserve tenure. With the solitary exception noted above—and you might be able to talk me out of that one, too—nobody has a right to lifetime employment unrelated either to their on-the-job performance or to their employer’s continuing need for the skills and attributes of that particular person.
Tenure didn’t come down from Mt. Sinai or over on the Mayflower. Though people occasionally refer to its origins in medieval universities, on these shores, at least, it’s a twentieth-century creation. The American Association of University Professors (AAUP) began pushing for it around 1915, but tenuring professors didn’t become the norm on U.S. campuses until after World War II (when the presumption of a 7-year decision timeframe also gained traction) and it wasn’t truly formalized until the 1970’s when a couple of Supreme Court decisions made formalization unavoidable.
In some states, public-school teachers began to gain forms of job protection that resembled tenure as early as the 1920s, but these largely went into abeyance during the Great Depression and were not formally reinstated until states—pressed hard by teacher unions—enacted “tenure laws” between World War II and about 1980.