Here's a little thought experiment: when a company has layoffs, do more young people or more old people get the axe?

If we get to a place where people can live healthy lives until they are 300 years old, why do you think someone who finished college 40 years ago will be more valuable for a company than a fresh graduate? Because nowadays we have exactly this setup minus the 300 year lifespan, and often times the company is happy to let go of the senior guy.