Social mobility seems worse now than at any time in my 60+ years. So many young people can't afford to go to uni, can't buy a house etc. I have friends who, in their 50s, are having to increase their working hours because they will have to help their kids financially through uni (kids doing nursing & midwifery, so unable to work much while studying).
There used to be a couple of routes up for my generation: getting decent exam results and getting a job that enabled you to get a professional qualification while working, and passing the 11+, going to grammar school and then on to uni and coming out with a decent degree that opened doors. This has enabled many of my peers to become teachers, doctors, civil engineers, lawyers etc.
All those professional jobs are now graduate only and for a lot of families, going to uni just isn't an option. I also think schools often neglect bright kids, because they know they'll achieve the 5 A-C grades without any help, and consequently they don't achieve their full potential.
I wouldn't want to go back to the days of selective secondary education, which made a lot of kids feel like rejects like rejects at 11, but for bright kids from poor backgrounds, it was a huge help.
As of course were maintenance grants, no tuition fees etc.