For the final time because much as I want to let it go (and I will regarding your foulness to me, who is "riddled with arthritis" (yes I noticed you stuck that in there in your other post about what happens when people are in their late sixties to make a little dig at someone who has had it for most of their life..... very clever indeed).
There. Are. Professional. And. Successful.People.In.Spain.
I'm one of them. Despite "being English" and "my health issues". I have worked very hard, and I am successful. I'm doing a Spanish law degree because I want to change career and well - because I can. I already have a degree in an academic subject from a Russell Group university in the UK.
Good lord. And separately to that, has it ever occurred to you that there might be people who have the kind of jobs you look down your nose at who are decent, happy people? That money and professional success isn't everything? And yes some people in Spain are poor just like some people in the UK are poor.
You seem to have a fundamental misunderstanding of how societies work.
Perhaps you weren't successful in Spain. It's ok - it is of course more difficult to become successful in a country that you were not born in as you have to build yourself up from nothing. But that doesn't mean noone is able to do it, nor that your children couldn't have managed. My kids are in public school here (because I believe in a state education, because I want them to grow up as Catalan kids do, because I appreciate the fact that they are all now trilingual as a result, because I like the values that are taught in public schools etc etc).
Someone with your views (if they had enough money) could have sent their children to one of the many British international schools and they could have benefited from the UK education and gone to UK universities and you would have been able to stay in Spain. Of course, you would have been have to have been able to afford that yourself, perhaps you couldn't and that's fine but it does somewhat suggest that your rage against Spain was because you yourself didn't do well here. That doesn't mean that noone can.
For someone with such an obsession with education you come across as someone with a very limited understanding of the world.