I'm not a lawyer, but AFAIK, age doesn't influence your social score, tenure does. If I'm a 30 year old with 10 years in the company, I will have a better score than 50-year-old you who got hired 7 months ago.
The idea is that working at a company "squeezes juice out of you", so you should not be so easily fired after a long tenure, because the company got all the rewards from your juice, but you don't have much left. You can agree or disagree, but I have to admit that there is a logic.
I understood the logic to be instead that older people nearing retirement find it much harder to get new jobs.
And I agree there is logic to all of these things we are discussing. The problem is rather that everything is falling apart in other ways so young people get the raw end both times. Many of these older folk will be on rent controlled flats that are not available to young people, for example.
The idea is that working at a company "squeezes juice out of you", so you should not be so easily fired after a long tenure, because the company got all the rewards from your juice, but you don't have much left. You can agree or disagree, but I have to admit that there is a logic.