Complicating the problem, older workers are also outnumbered in the workplace. There are 89 million millennials (roughly between 1981 and 1996) and 75 million boomers (born between 1946 and 1964) in the U.S., compared with just 49 million Gen Xers (born between approximately 1965 and 1980). “There’s no getting around the fact that companies are looking to retire older workers and hire younger workers,” Mark James, founder and president of Hire Consulting Services in San Diego. Their greater experience and relatively higher salary requirements makes them overqualified for opportunities, he says, and expensive to keep.
http://www.marketwatch.com/story/why-older-workers-shave-years-off-their-resume-2015-05-07