Puzzled blogger seeks enlightenment

Don't know much about socioeconomics, so I was intrigued by a couple of the recommendations put forth by Raúl Castro during his speech Friday, regarding the Social Security bill and employment issues. According to the draft proposal, retirees may rejoin the labor force for full wages. Castro even invited retired teachers "to return to [their] noble profession" and "contribute [their] professionalism and experience" for the full standard wages plus their regular pension. And the government is weighing the possibility of allowing people to hold more than one job, "the so-called pluri-employment."
So, if retirees and "pluri-workers" (for lack of a better word) rejoin the work force and take up the available jobs, where does that leave the young and inexperienced people who are looking for entry-level jobs to join the labor force? Will there be enough jobs for all?
It sounds like a Catch-22 situation, where a young person's only way to gain experience is to get a job, but he can't get a job because he lacks the experience an older candidate (retiree or pluri-worker) brings. Perhaps a reader can enlighten me.
---Renato Pérez Pizarro.