I come from this kind of family. On the one hand there were plenty of people who didn’t share those values and went into the ‘chavvy’ stereotype who became the underclass. On the other, many of us who followed these routes, late Gen X and millennial generation, found ourselves facing the complete change of our world to a neoliberal, rentier economy.
All our work has come to little because of that change, the single biggest impact is the explosion of buy to let and the explosion of house prices around the turn of the milllennium. While wages did not move at all. Instead of working for ourselves we found ourselves working to pay mortgages and retirements in Spain for the boomers.
After years of trying to be heard, trying to make the impacts on our lives understood, we began to realise in 2008 or so that the impact was known very well and actually it was wanted by that group and the financial elites. So you know what? We realised that the ladders were broken beyond repair deliberately and slowly more and more of us stopped trying to be mugs.
There were loads of economic books that came out around 2010 or so protesting and providing information about the impacts. No one cared - it took a while to realise that the actual culture had changed and we were now back in an imperial society that actively wants two-tier societies and classes of no hope - but all that literature is still there to peruse if you genuinely want to know the answer to your question. There was loads of info from organisations like the OECD too. I could do you a whole reading list but let’s start with Selina Todd’s ‘Snakes and Ladders: the great British social mobility myth’. It’s readable. ‘The Spirit Level’ is a classic too .
We knew we had been betrayed, is the short answer.