We came out of the both world wars with enormous debts and we still have debts from WW1 that have not yet been paid and exact annual interest payments.
But I do not think things were as ros yin the 50s as you paint them Joelsnan. Transport facilities were pretty awful, railway stock was extremely old, 50 years or more, stations were shabby and rundown. Ditto buses. The transport infrasctructure was partly protected and survived because of the mass exodus to the roads, which we used much less because most families were careful about buying petrol and using their car much.There were no motorwayas and much lower traffic densities and no huge heavy lorries meant that roads got much less wear and could be built to much lighter standards. I can remember casually accepting walks of up to 5 miles to get to somewhere I wanted to go because of the lack of buses or trains.
Nor was the care of the elderly anywhere as good as it is now, it was not unknown for elderly people to die of starvation and an aunt of mine who was a nurse, gave me some graphic descriptions of the condition of many of the elderly patients she was nursing, malnourished, frozen, living in one room with no facilities. Nowadays that can happen, but it is rare. No Pension Credit, no housing benefit or Council tax relief. All had to be paid from a meagre pension.
Electronics has not made health care cheaper. Until the 1960s hospitals could provided patient care; nursing, xrays and a few tests. Since then advances in medical care mean that many people who would simply have had nursing care until they died will live, but will need medication and ongoing out patients treatment until they died. Much run of the mill medical equipment such as CT and MRI scanners cost 100s of thousands of pounds and so does other equipment. Highly specialised beds, trolleys and other such equipment, much better salaries for medical workers all mean the cost of providing the health service has rocktted.