Expectations are higher - we don't doff our caps and live on the breadline anymore as many of our parents/grandparents may have done (although I appreciate that there are still many people who do struggle financially).
Also we have equality legislation - men worked, women stayed at home but now we have legislation to (try to) ensure that men and women are treated the same at work and paid the same for the same work etc. Women see that they can have more of a role in life than doing the housework and looking after the kids. Men see that they can have more of a role in life than going out to work and coming home and flopping in front of the TV or going to the pub.
Also university is not just for the rich, it's for anyone who can get the necessary qualifications to get in so you have a lot more qualified people of both sexes so expectations of earning (and therefore) spending power have increased.
So social norms have changed.
And then as people have mentioned, the cost of living has risen and also there is more to buy/pay for. Also schools are always asking for money for things, so it's not just about "keeping up with the Jones", wanting an expensive house, car, holiday but also wanting to ensure that your child can go on school trips, learn to swim, learn to drive, etc.
So it's not just housing - think about the cost of running a car, or rail fares as well.
People say that social breakdown is down to women working. Well I'd rather live now than in the 1950s. I like the fact that I can choose to work or not. I like the fact that sexism is less acceptable, that if someone pinches my bottom I can get something done about it, that being gay isn't illegal, that having a child outside wedlock is not considered to be worse than murder etc etc.
I have no illusions about "the past". We are much better off now - in general.