Should money made in the capital stay in the capital? Boris Johnson thinks so.
He's wants the Government to give London the 1.3 billion pounds raised here through Stamp Duty every year.
With property prices traditionally higher than anywhere else in the country, the Mayor thinks the money made selling flats and houses should benefit Londoners, and be used to build more so-called affordable homes.
So is this the right way to solve the housing crisis?
Here's Rags Martel.