Builders are supposed to be concentrating on affordable housing, are they not?

Just down the roar from my house 45 new houses have just been 'slung' up, Prices range from £367,000. to £450,000, wages in our rural area £20,000 to £22,000. which means youngsters don't stand a cat in hells chance of being able to afford a house, who are the lunatics fixing prices this high, and no, it's not demand in my book it's profit! opinions most welcome