@socialmedia23
I agree with you up to a point. It's true that 30 years ago (and even more 40 or 50 years ago) the private renting sector was very small. I also agree that in the past plenty of jobs that don't provide enough of an income now to buy a house did so in the past. I think that's mostly the value of houses increasing way above inflation and wages not keeping pace.
Incidentally before WW1 hardly anyone could afford to buy a house: provision of social housing depressed house prices, and perhaps we're now reverting to normality.
But we need to beware of things being that rosy in the past. I read a book called A Working Life by Polly Toynbee - published in the 60s - each chapter is devoted to a working class job she did, mostly in factories. They were all pretty poorly paid - awful, boring, dehumanising jobs - and the people she worked along side certainly weren't buying houses. They also weren't generally living in nicely-built new council estates either. They were living in slum housing built in Victorian times. Lots of British people were emigrating in those days to Australia and New Zealand for better prospects. Those countries - particularly the latter - were comparatively very wealthy but, to be honest, the 1960s NZ house I've lived in for the last decade is pretty basic, not very big, cold in winter, and certainly not big enough to fit in a lot of things. But it was a better alternative to living in a damp, cold draughty Victorian house and working in a factory in Britain.
Regarding single parent families: I think the change there is mostly to do with changing moral values, and I actually don't think that's economic at all. I think it's more that before the 80s, when everything started to change, the expectation on everyone was that you would marry and have a family in due course, and putting it off was frowned upon. So was divorce. This expectation was on both men and women. The attitude now is about free choice. Of course no one sensible wants to have children in difficult economic circumstances, but having a plan generally makes things easier, and this includes when society tells you what the plan is. Also - and I'm not making any comment on the morals of each alternative here - it's easier for governments to structure social provision around the former - it's cheaper, and splitting families spreads people across more houses which I suspect reduces the average number of people in houses. Furthermore, back in the day, if you were single, you lodged with a family or a bunch of other lodgers, and your tenure was pretty insecure. You generally did not have a place of your own.
The point of all this is that in the past a) average people often really weren't that flash b) the family was the mainstay and people outside one struggled and c) government support existed but there is now an expectation that the government provide support that b) provided in the past.