MMMarmite, I'm not completely sure why things have gone this way, quite suddenly. There is a lot of golden-ageism being bandied about, people rabbitting on about how everything was better in the 1950s before these progressives came along and ruined everything by wanting things to be, shock horror, fairer.
Those in power are genuinely threatened by things like feminism, disability rights and progressive social theory, as they challenge the status quo, and their right to lord it over everyone else. I know that's a bit vague, but I think it is true.
I'm not sure why it has got such a hold of public imagination though. A silly question in present company, obviously, but how many of us know someone who has a physical disability, a more complex disability, SEN, chronic illness, mental health problems? Even if it's someone we don't know well, we all know OF someone with one of these things, and probably know others without knowing their status regarding any of the above. Add to that, the many other categories of person who, despite having no specific label-able problem, do not flourish in competitive environments. Yet you still hear people going on and on about competition being good for development, "character building", necessary for learning, blah blah blah. Then we get into work, where competition and retaining a competitive edge are sucking the life out of our jobs and making our employment seriously unstable.
Maybe it's because we are in a rubbish financial state and it's easy to blame the former government, even though they were only Labour in name and started this stuff?