| After doing some research to fully understand the question been asked, i found that in need to under a few key words "Ageism and Lump of labor fallacy". Once i understand what these key words meant, it was clear how i wanted approach this question. 1. Ageism: according to discrimination against persons of a certain age group. a tendency to regard older persons as debilitated, unworthy of attention, or unsuitable for employment. Coined 1969 by U.S. gerontologist Dr. Robert N. Butler, from age + -ism, on pattern of racism, sexism. Related: Ageist.(dictionary.com, 2017) 2. Lump of labor fallacy: In economics, the lump of labor fallacy is the idea that there is a fixed amount of work - a lump of labor - to be done within an economy which can be distributed to create more or fewer jobs. It was considered a fallacy in 1891 by economist D.F. Schloss, who held that the amount of work is not fixed. (Wikipedia.com, 2017) I would have to pick the "Ethical Egoism" as the perspective for the older group to use when arguing with the younger work force. As mention in past topic Ethical Egoism-"argues that our moral evaluations should be made in terms of our desires and goals. Something that promotes what I want is regarded as right; something that interferes with what I want, or prevents me from reaching my goals, is regarded as wrong." "These findings also suggests that the u-turn of policy makers since the mid 1990s to redesign social security programs and pension schemes to create stronger incentives for continued work at older ages will have no adverse effects on youth employ- ment." ( KALWIJ, KAPTEYN, DE VOS, 2010)
According to research completed by kalwij, Kapteyn and De Vos, during the years of 1969 to 2008 there was an increase of 4% in older worker (ages 55-64) still working from 56% in 1969 to 60% in 2008. One could say the reason for this is the shift in incentives of retirement and social security pay. Early retirement pay was less enticing and social security became more profitable for elders to see and live on comfortably once they retire.
Argument: P: Early retirement is not worth it. P: If you collect your social security to early you can lose out on other benefits P: I want to live on the beach when i retire P: I cant afford that lifestyle on my social security only P: Need to collect a pension and social security to afford the beach lifestyle Therefore, i will continue to work till i'm able to get a pension with my current employer.
With this argument the ethical egoism is only thinking about his own desire and what/how he needs to accomplish that goal.
References: Ageism defined Wikipedia Kalwij, A., Kapteyn, A., & De Vos, K. (2010). Retirement of Older Workers and Employment of the Young. De Economist, 158(4), 341-359. doi:http://dx.doi.org.proxy-library.ashford.edu/10.1007/s10645-010-9148-z | 
