I saw this graph and I do think it very important to consider the element of infaltion.In 1970 my basic wage was £16, yes £16 a week,with overtime I would average £24 per week.Not a bad wage at the time.By 1980 I earnt around £200 pounds a week in a management position although I guess maybe around £160 to £170 a week would be a little more typical.
1970 approx£2,500 to £3,000 would have got you a smallish 3 bedroom semi in Reading worth by 1980 around £25,000.So house price inflation appeared to run very much in a linear fashion to wages certainly up to that point.
Put another way,many of my friends who were single around that time had no bother buying on one wage.The same house in Reading right now is priced at around £180,000 meaning a single person would need to earn £1,000+ per week to achieve the same.
Truly,I have very few friends or aquaintances,who even at the top of their careers are earning that.