Von Thünen's/Ricardo's Law of Rent, part the manieth.

From The Metro:

Jobs website Adzuna compared average advertised salaries with average rental figures across the UK to find the most and least affordable towns and cities for renters to live. In Swindon, workers typically spend 11.5 per cent of their take-home pay on rent, compared with a national average of 22.1 per cent.

Andrew Hunter, co-founder of Adzuna, said: ‘Even though workers may be paid a higher monthly salary, their left-over cash is often smaller after paying steep living costs and local property premiums.’

Correct. Why would you expect any other outcome?

They list the areas with the lowest and highest rent-to-income ratios, quite unsurprisingly, these are pretty much in line with the local average wages that people in their twenties and thirties can earn.