I'd like to see the building of a lot more flats, and developing the living space in cities instead of giving it all over to commerce and offices. Apparently there are enough empty floors above shops in London to solve the housing crisis for the whole of the UK. If owners could be pressurised into turning these into liveable spaces, it would force the cost of accommodation down by market forces.
Young people tend to prefer to live in cities anyway, and a profusion of cheaper dwellings could only benefit them. To my mind, this poverty is not a demographic problem, it's a problem caused by the fact that property is an investment market in the UK. We could all do with losing a lot of value on our houses (as long as we're not in negative equity) to try to turn the housing market back upside down. It makes absolutely no sense for older people to be living in a £1million house with no mortgage (simply because they bought when it was cheap and the house prices rose around them) while their 8 grandchildren are flat sharing until they're 40.
I've been having this type of conversation recently with my lovely and shrewd MIL, who is fully conscious of the fact that she has been in a golden demographic. It's not her fault, it's not anybody's fault and god knows those people and children who'd endured the war (MIL is a 1938 birthday) deserved a lot of payback, but that time will never come back. It simply can't.
As far as your proposed retirement age goes, OP, I am 46 and fully expecting that nobody of my age will be able to retire till they're at least 70. People my age were virtually the last to have full grants and zero university fees, and to be able to buy houses at relatively affordable rates in the early 90s. Once this generation of retirees has gone, I think we can expect a large scale restructuring of a lot of things. Everyone will be retiring much much later for a start.