Lets see, 60,000 leave school per year at 19 ish and 'form' a household with an average of 3 persons. Thats requires 20,000 gaffs a year assuming nobody fecks off to Australia . Thereafter they recycle into other households but the basic formation group is aged about 19 .
60,000 immigrate requiring another 20,000 gaffs (actually its less because immigrants frequently sleep 5 or 6 to a house or flat to save money which is what they come here to do ) .
I make the natural household formation (rate per annum) out to be 40,000 by that reckoning and we had problems building more than 40,000 units a year until fairly recently.
I was referring to this type of logic above actually.
The point you seem to be making is that we're building houses that no one wants.
Builders could not stay in business if people weren't buying their developments.